Directions: For each situation, you need to determine if the object has KE or GPE or both. Then find their values. Be sure to include the correct units.

A 2-kg bowling ball sits on top of a building that is 40 meters tall.

Circle one: KE / GPE / both

Show your work for finding the values of each type of energy the object has:

A 2-kg bowling ball rolls at a speed of 5 m/s on the roof of the building that is 40 tall.

Circle one: KE / GPE / both

Show your work for finding the values of each type of energy the object has:

A 2-kg bowling ball rolls at a speed of 10 m/s on the ground.

Circle one: KE / GPE / both

Show your work for finding the values of each type of energy the object has:

A 20-kg child is tossed up into the air by her parent. The child is 2 meters off the ground

traveling 5 m/s.

Circle one: KE / GPE / both

Show your work for finding the values of each type of energy the object has:

Part 2: Finding Speed and Height Using Energy

Directions: Use the KE and GPE equations to solve for speed or height depending on the situation.

A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed?

A 200-kg boulder has 39,200 joules of gravitational potential energy. What height is it at?

A 1-kg model airplane has 12.5 joules of kinetic energy and 98 joules of gravitational potential energy. What is its speed? What is its height?

Question

10-04-2018
Physics

contestada

Directions: For each situation, you need to determine if the object has KE or GPE or both. Then find their values. Be sure to include the correct units.

A 2-kg bowling ball sits on top of a building that is 40 meters tall.

Circle one: KE / GPE / both

Show your work for finding the values of each type of energy the object has:

A 2-kg bowling ball rolls at a speed of 5 m/s on the roof of the building that is 40 tall.

Circle one: KE / GPE / both

Show your work for finding the values of each type of energy the object has:

A 2-kg bowling ball rolls at a speed of 10 m/s on the ground.

Circle one: KE / GPE / both

Show your work for finding the values of each type of energy the object has:

A 20-kg child is tossed up into the air by her parent. The child is 2 meters off the ground

traveling 5 m/s.

Circle one: KE / GPE / both

Show your work for finding the values of each type of energy the object has:

Part 2: Finding Speed and Height Using Energy

Directions: Use the KE and GPE equations to solve for speed or height depending on the situation.

A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed?

A 200-kg boulder has 39,200 joules of gravitational potential energy. What height is it at?

A 1-kg model airplane has 12.5 joules of kinetic energy and 98 joules of gravitational potential energy. What is its speed? What is its height?

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nustopocru nustopocru · Answer 1 · 2018-04-10T20:47:16+02:00

A 2-kg bowling ball sits on top of a building that is 40 meters tall.

GPE

A 2-kg bowling ball rolls at a speed of 5 m/s on the roof of the building that is 40 tall

its moving n its on top of a bldg. so ans is both KE n GPE

A 2-kg bowling ball rolls at a speed of 10 m/s on the ground.

KE

A 20-kg child is tossed up into the air by her parent. The child is 2 meters off the ground traveling 5 m/s.

moving n in the air. ans is both KE n GPE

eqn: KE= 1/2mv^2, GPE=hmg

A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed?

50000=1/2*1000^v^2

v=10m/s

A 200-kg boulder has 39,200 joules of gravitational potential energy. What height is it at?

39200=200*9.8*h

h=20m

A 1-kg model airplane has 12.5 joules of kinetic energy and 98 joules of gravitational potential energy. What is its speed? What is its height?

12.5=1/2*1*v^2

v=5m/s

98=1*9.8*h

h=10m

Asdfjkadfjkakjf Asdfjkadfjkakjf · Answer 2 · 2018-04-13T12:00:37+02:00

Part 1

First GPE
Second both KE n GPE
Third KE
Fourth both KE n GPE

A 1,000-kg car has 50,000 joules of kinetic energy.

1/2*1000^speed^2=50000
speed=10m/s

A 200-kg boulder has 39,200 joules of gravitational potential energy.
200*9.8*height=39200
height=20m

A 1-kg model airplane has 12.5 joules of kinetic energy and 98 joules of gravitational potential energy.

1/2*1*speed^2=12.5
speed=5m/s
1*9.8*height=98
height=10m