Energy Calculations

In the following example, will the object G.P.E increase, decrease, or remain constant

(An Apple falls from a tree)

• Increase

• Decrease

• Remain Constant

In the following example, will the object G.P.E increase, decrease, or remain constant

(An Aircraft flies horizontally at a height of 9000m)

• Increase

• Decrease

• Remain constant

In the following example, will the object G.P.E increase, decrease, or remain constant

(A sky-rocket is fired into the sky)

• Increase

• Decrease

• Remain constant

A girl of weight 500 N climbs on top of a 2.0 m high wall. By

how much does her g.p.e. increase

• 250 J

• 10000 J

• 1000 J

• 0.004 J

A stone of weight 1.0 N falls downwards. Its g.p.e. decreases by

100 J. How far has it fallen?

• 100 m

• 1000 m

• 1 m

How much k.E. is stored by a 1.0 kg ball moving at 1.0 m/s?

• 0.5 J

• 1 J

• 2 J

The pressure due to the liquid on an object immersed in that liquid is 4500 Pa.

The density of the liquid is 900 kg/m³

What is the depth of the object below the surface of the liquid?

• 0.5 cm

• 2.0 cm

• 50 cm

• 200 cm

An object is 60 cm below the surface of a liquid. The pressure due to the liquid at this depth is 9000 Pa.

What is the Density of the liquid?

• 15 kg/m³

• 540 kg/m³

• 1500 kg/m³

• 54,000 kg/m³

Which diagram shows an athlete exerting the least pressure on the ground?

• A

• B

• C

• D

• A

• B

• C

• D