Directions:
Solve each problem. Make sure your answer is as reduced as possible.
1. 4/9 + 5/9 = ________________________
2. 4/5 – 2/5 = ________________________
3. 4/7 + 6/7 = ________________________
4. 2/9 – 1/9 = ________________________
5. 7/10 + 11/20 = ________________________
6. 9/10 – 7/15 = ________________________
7. 1/6 + 5/6 = ________________________
8. 1/5 + 1/2 = ________________________
9. 7/12 – 2/3 = ________________________
10. 11 – 3 1/4 = ________________________
11. 1/5 + 1/6 = ________________________
12. 4/9 x 4/5 = ________________________
13. 11/30 x 7/22 = ________________________
14. 4/5 divided by 1/10 = ________________________
15. 8/11 divided by 5/8 = ________________________
16. 12 divided by 2/5 = ________________________
© 2018 Laura Glassel – lizzietutoring.blogspot.com
Tuesday, April 24, 2018
Tuesday, April 17, 2018
Physics - Velocity and Acceleration Practice Problems - Part 2
Problem 1
You roll a ball against a wall that is 7.4 meters away from you. The ball bounces off the wall and rolls back 2.7 meters towards you before it stops. What is the total distance covered by the ball? What is the displacement of the ball?
Answer: _______________________
Problem 2
You ride your bike a distance of 129.4 meters down the street in 22.9 seconds. You turn around and ride the same distance back to where you started. The return trip takes 31.7 seconds. What was your speed and what was your velocity over the course of the entire bike ride?
Answer: _______________________
Problem 3
A car drives 271 meters down a road for 48 seconds. It stops and then turns around and drives only 78 meters back in 19 seconds. What is the velocity of the car for the first part of the trip? What is the velocity of the car for the second part of the trip? What is the velocity for thecar for the entire trip?
Answer: _______________________
Problem 4
A driver drives his car down a long, straight country road at 83 km/hr. If he drives in that direction for 45.6 minutes, how far does he drive?
Answer: _______________________
Problem 5
A car and a semi are approaching each other on a 2-lane road. The car is traveling at 41 mph,and the semi is traveling at 72 mph. If you were standing at the side of the road watching thesituation, what velocity would you observe for the car? What velocity would you observe for the semi? What velocity does the driver of the car observe for the semi? What velocity does the driver of the semi observe for the car?
Answer: _______________________
Problem 6
A runner is moving with a velocity of 5.9 m/sec to the west. The runner hears someone honking at him and slows down immediately. He stops after 3.6 seconds. What was his acceleration?
Answer: _______________________
Problem 7
A car slams on the brakes to avoid hitting an obstacle in the road. If the car has a maximum deceleration of 5.9 m/sec2 and it takes 22 seconds for the car to stop, how fast was the car initially traveling?
Answer: _______________________
© 2018 Laura Glassel – lizzietutoring.blogspot.com
You roll a ball against a wall that is 7.4 meters away from you. The ball bounces off the wall and rolls back 2.7 meters towards you before it stops. What is the total distance covered by the ball? What is the displacement of the ball?
Answer: _______________________
Problem 2
You ride your bike a distance of 129.4 meters down the street in 22.9 seconds. You turn around and ride the same distance back to where you started. The return trip takes 31.7 seconds. What was your speed and what was your velocity over the course of the entire bike ride?
Answer: _______________________
Problem 3
A car drives 271 meters down a road for 48 seconds. It stops and then turns around and drives only 78 meters back in 19 seconds. What is the velocity of the car for the first part of the trip? What is the velocity of the car for the second part of the trip? What is the velocity for thecar for the entire trip?
Answer: _______________________
Problem 4
A driver drives his car down a long, straight country road at 83 km/hr. If he drives in that direction for 45.6 minutes, how far does he drive?
Answer: _______________________
Problem 5
A car and a semi are approaching each other on a 2-lane road. The car is traveling at 41 mph,and the semi is traveling at 72 mph. If you were standing at the side of the road watching thesituation, what velocity would you observe for the car? What velocity would you observe for the semi? What velocity does the driver of the car observe for the semi? What velocity does the driver of the semi observe for the car?
Answer: _______________________
Problem 6
A runner is moving with a velocity of 5.9 m/sec to the west. The runner hears someone honking at him and slows down immediately. He stops after 3.6 seconds. What was his acceleration?
Answer: _______________________
Problem 7
A car slams on the brakes to avoid hitting an obstacle in the road. If the car has a maximum deceleration of 5.9 m/sec2 and it takes 22 seconds for the car to stop, how fast was the car initially traveling?
Answer: _______________________
© 2018 Laura Glassel – lizzietutoring.blogspot.com
Tuesday, April 10, 2018
New Worksheet - Physics - Force, Work, and Power - Part 2
Problem 1
Jane climbs to the top of a 19 meter rope in 88.5 seconds. If Jane weighs 49 kg, how much power must she deliver to complete the task?
Answer: _______________________
Problem 2
Rachel climbs to the top of a 15 meter rope in 71.5 seconds. If Rachel weighs 53 kg, how much power must she deliver to complete the task?
Answer: _______________________
Problem 3
Find the kinetic energy of a 758 kg roller coaster that is moving with a velocity of 17.14 m/s.
Answer: _______________________
Problem 4
Find the kinetic energy of a 692 kg roller coaster that is moving with a velocity of 15.32 m/s.
Answer: _______________________
Problem 5
A runner covers one lap of a circular track, which is 50.0 m in diameter, in 59.3 s. For that lap,what was his average speed? What was his average velocity?
Answer: _______________________
Problem 6
A runner covers one lap of a circular track, which is 72.0 m in diameter, in 84.7 s. For that lap,what was his average speed? What was his average velocity?
Answer: _______________________
Problem 7
A car traveling at 94 km/hr comes to a stop after 192 m. Find the car’s average acceleration. Be sure your final answer is in m/s^2.
Answer: _______________________
Problem 8
A car traveling at 73 km/hr comes to a stop after 201 m. Find the car’s average acceleration. Be sure your final answer is in m/s^2.
Answer: _______________________
Problem 9
A 582 kg crate must be lifted 12.9 m into the second story of a building. How much work must be done to move the crate? A block and tackle is used instead and an effort force of 5642 N is applied to lift the crate at a constant speed. If 57 m of rope is pulled through the block and tackle system, what is its efficiency?
Answer: _______________________
Problem 10
A 745 kg crate must be lifted 11.7 m into the second story of a building. How much work must be done to move the crate? A block and tackle is used instead and an effort force of 4893 N is applied to lift the crate at a constant speed. If 49 m of rope is pulled through the block and tackle system, what is its efficiency?
Answer: _______________________
© 2018 Laura Glassel – lizzietutoring.blogspot.com
Jane climbs to the top of a 19 meter rope in 88.5 seconds. If Jane weighs 49 kg, how much power must she deliver to complete the task?
Answer: _______________________
Problem 2
Rachel climbs to the top of a 15 meter rope in 71.5 seconds. If Rachel weighs 53 kg, how much power must she deliver to complete the task?
Answer: _______________________
Problem 3
Find the kinetic energy of a 758 kg roller coaster that is moving with a velocity of 17.14 m/s.
Answer: _______________________
Problem 4
Find the kinetic energy of a 692 kg roller coaster that is moving with a velocity of 15.32 m/s.
Answer: _______________________
Problem 5
A runner covers one lap of a circular track, which is 50.0 m in diameter, in 59.3 s. For that lap,what was his average speed? What was his average velocity?
Answer: _______________________
Problem 6
A runner covers one lap of a circular track, which is 72.0 m in diameter, in 84.7 s. For that lap,what was his average speed? What was his average velocity?
Answer: _______________________
Problem 7
A car traveling at 94 km/hr comes to a stop after 192 m. Find the car’s average acceleration. Be sure your final answer is in m/s^2.
Answer: _______________________
Problem 8
A car traveling at 73 km/hr comes to a stop after 201 m. Find the car’s average acceleration. Be sure your final answer is in m/s^2.
Answer: _______________________
Problem 9
A 582 kg crate must be lifted 12.9 m into the second story of a building. How much work must be done to move the crate? A block and tackle is used instead and an effort force of 5642 N is applied to lift the crate at a constant speed. If 57 m of rope is pulled through the block and tackle system, what is its efficiency?
Answer: _______________________
Problem 10
A 745 kg crate must be lifted 11.7 m into the second story of a building. How much work must be done to move the crate? A block and tackle is used instead and an effort force of 4893 N is applied to lift the crate at a constant speed. If 49 m of rope is pulled through the block and tackle system, what is its efficiency?
Answer: _______________________
© 2018 Laura Glassel – lizzietutoring.blogspot.com
Tuesday, April 3, 2018
New Worksheet - Physics - Sound - Part 2
Formulas
speed of sound = [1087 + 1.1 (temperature – 32)] ft/sec
intensity level = 10 log (intensity / intensity of threshold of hearing)
Mach number = speed of object / speed of sound
Problems
1. What is the speed of sound at a temperature of 72° F?
Answer: _______________________
2. What is the speed of sound at a temperature of 81° F?
Answer: _______________________
3. What is the speed of sound at a temperature of 53° F?
Answer: _______________________
4. The intensity of a given sound is 10-2 Watts / m2. What is the intensity level in decibels?
Answer: _______________________
5. The intensity of a given sound is 10-8 Watts / m2. What is the intensity level indecibels?
Answer: _______________________
6. What is the Mach number for a plane traveling at 921 mph when the temperature is 47° F?
Answer: _______________________
7. What is the Mach number for a plane traveling at 817 mph when the temperature is 54° F?
Answer: _______________________
8. What is the Mach number for a plane traveling at 736 mph when the temperature is 42° F?
Answer: _______________________
9. What is the Mach number for a plane traveling at 942 mph when the temperature is 37° F?
Answer: _______________________
© 2018 Laura Glassel – lizzietutoring.blogspot.com
speed of sound = [1087 + 1.1 (temperature – 32)] ft/sec
intensity level = 10 log (intensity / intensity of threshold of hearing)
Mach number = speed of object / speed of sound
Problems
1. What is the speed of sound at a temperature of 72° F?
Answer: _______________________
2. What is the speed of sound at a temperature of 81° F?
Answer: _______________________
3. What is the speed of sound at a temperature of 53° F?
Answer: _______________________
4. The intensity of a given sound is 10-2 Watts / m2. What is the intensity level in decibels?
Answer: _______________________
5. The intensity of a given sound is 10-8 Watts / m2. What is the intensity level indecibels?
Answer: _______________________
6. What is the Mach number for a plane traveling at 921 mph when the temperature is 47° F?
Answer: _______________________
7. What is the Mach number for a plane traveling at 817 mph when the temperature is 54° F?
Answer: _______________________
8. What is the Mach number for a plane traveling at 736 mph when the temperature is 42° F?
Answer: _______________________
9. What is the Mach number for a plane traveling at 942 mph when the temperature is 37° F?
Answer: _______________________
© 2018 Laura Glassel – lizzietutoring.blogspot.com
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