In this worksheet, we will practice calculating the work done by a constant force acting on a particle.

Q1:

A body of mass 0.9 kg moved a distance of
25 cm while accelerating at
8 cm/s^{2}.
Find the work done in ergs.

A

B

C

D

E

Q2:

A body moves in a straight line against a resistance force of 360 N. Find the work done by this force over the displacement ,
where .

Q3:

The figure shows a force of magnitude 2 N and the displacement
covered by a body acted on by the force.
Find the work done by the force.

A8
J

B J

C J

D32 J

Q4:

How much work is done by a force of magnitude 200 newtons and direction
30 degrees from the
horizontal which slides a crate 20 meters
horizontally along a dock? Give your answer to two decimal places.

Q5:

A body of mass 27 kg was placed at the top of a smooth inclined plane of height 4.5 m.
It slid down the line of the greatest slope until it reached the bottom of the plane. Calculate the work done by the weight of this body,
given that the acceleration due to gravity .

Q6:

Calculate the work done, in kilojoules,
to lift 50 m^{3} of water to a height of
6 m, given that the density of water is
1,000 kg/m^{3}.
Take .

A300 kJ

B490 kJ

C2,940 kJ

D58.8 kJ

Q7:

A force acted on a body of mass 400 g which had been at rest causing it to accelerate at 36 cm/s^{2}.
If the work done by this force was 0.72 joules,
find the distance the body moved.

Q8:

A car is moving on a straight road with a constant velocity of 12 km/h. Given that the force generated by the engine of the car is
36 kg-wt, find the work done by the resistance of the
road in one minute.

Q9:

A construction worker of mass 100 kg is carrying some bricks up a ladder of height 15 m. If the work done by the construction worker in climbing the ladder is 20,433 J, find the mass of bricks. Take .

Q10:

A body of mass 900 g was projected vertically upwards at
6.4 m/s.
Find the work done by the weight of the body during the first 5 seconds
of the motion of the body. Take .

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