A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby has a mass of 1.5 kg.

Calculate the final velocity of the baby carriage if it were to roll down the hill. Assume any frictional forces are negligible.

Give your answer to 1 decimal place.

(a)  

A cinder block is sitting on a platform 20 m high. It weighs 7.9 kg. The block has (a)   energy. Calculate it.

A cinder block is sitting on a platform 20 m high. It weighs 7.9 kg.

If the block fell of the platform, calculate its velocity just before it hit the ground.

(a)  

A roller coaster is at the top of a 72 m hill and weighs 134 kg. The coaster (at this moment) has (a)   energy. Calculate it.

A roller coaster is at the top of a 72 m hill and weighs 134 kg.

Calculate its velocity by the time it reaches ground level. Assume friction is negligible.

Give your answer to 4 significant figures.

(a)  

There is a bell at the top of a tower that is 45 m high. The bell weighs 19 kg. The bell has (a)   energy. Calculate it.

There is a bell at the top of a tower that is 45 m high. The bell weighs 19 kg. Calculate its velocity just before it hits the ground if it fell from the tower.

(a)  

A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, then what is the potential energy of the loaded cart at the height of the seat-top?

(a)  

A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, then what would the velocity of the car be when it rolled back down the hill? Assume friction is zero.

Give your answer to 3 significant figures.

(a)  

A 75-kg refrigerator is located on the 70th floor of a skyscraper (300 meters above the ground) What is the potential energy of the refrigerator?

(a)  

A 75-kg refrigerator is located on the 70th floor of a skyscraper (300 meters above the ground)

What speed would it hit the ground at if the refrigerator were to be dropped out of a window?

Give your answer to 4 significant figures.

(a)  

The potential energy of a 40 kg cannon ball is 14000 J. How high was the cannon ball to have this much potential energy?

(a)  

The potential energy of a 40 kg cannon ball is 14000 J. What velocity would this cannon ball hit the ground at when it fell back to Earth?

Give your answer to 3 significant figures.

(a)