Force, Work and Energy

When I kick a ball, I use ____ force.

• gravitational

• muscular

• mechanical

• elastic

______ force is a force that comes into play when an object moves over another.

• Frictional

• Muscular

• Gravitational

• Mechanical

Look at the picture and identify the type of simple machine used.

• Pulley

• Inclined plane

• Lever

• Wedge

In Science, ____ is said to be done when an object moves as a result of force acting on it

• energy

• force

• work

• pressure

The interior of the earth has a source of energy called _____ energy.

• solar

• hydel

• geothermal

• atomic

Gravitational force is a/an ____ force.

• sudden

• recyclable

• adjustable

• attractive

Identify the correct statement about “Energy”.

• Chemical energy is converted into muscular energy when a cooker is heated on the stove.

• Muscular energy is converted into mechanical energy when a hand pump is operated.

• Chemical energy is converted into mechanical energy when we drive a car.

• Both (b) and (c)

Kiran dreamt of flying in a spacecraft in space. Find the correct statement about Kiran from the options listed below.

• Kiran was floating inside the spacecraft.

• Kiran wore no space suit inside the spacecraft.

• Kiran was able to walk in space without a tethering cable.

• Kiran came back to the earth’s surface due to gravity.

____ is a simple machine that is a long rod supported at one point and is used to lift heavy loads.

• Pulley

• Lever

• Wedge

• Screw

Match the following:

• {I-iii, II-i, III-ii}

• {I-ii, II-iii, III-i}

• {I-i, II-iii, III-ii}

• {I-ii, II-i, III-iii}