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1.
Which of the following quantities have both magnitude and direction?
I. Displacement
II. Speed
III. Momentum
I and II only
I and III only
II and III only
I , II and III
2.
An athlete weighs 750 N. Determine the athlete's mass.
[g = 10 m s-2]
750 kg
375 kg
75 kg
7500 kg
3.
A body is more stable when its centre of gravity is
at the centre.
at its top.
outside the body.
close to the ground.
4.
The principle of flotation states that
a floating body displaces its own weight of fluid in which it floats.
a floating body experiences an upward force equal to its weight.
a body immersed in a fluid does not displace the fluid.
the upthrust on a floating body exceeds the body's weight.
5.
A body has a weight of 720 N. Calculate the mass of the body
[g = 10 ms-2]
7.2 kg
72 kg
720 kg
7200 kg
6.
Which of the following forces is mainly reduced when a lubricant is applied to the moving parts of an engine?
Gravitational force
Magnetic force
Frictional force
Centripetal force
7.
A car of mass 1600 kg moves with a velocity of 80 ms-1.
Determine the momentum of the car.
1.28 x 106 kg ms-1
3.2 x 104 kg ms-1
6.4 x 104 kg ms-1
1.28 x 105 kg ms-1
8.
Which of the following quantities have both magnitude and direction?
I. Displacement
II. Speed
III. Momentum
I and II only
I and III only
II and III only
I , II and III
9.
An athlete weighs 750 N. Determine the athlete's mass.
[g = 10 m s-2]
750 kg
375 kg
75 kg
7500 kg
10.
A body has a weight of 720 N. Calculate the mass of the body
[g = 10 ms-2]
7.2 kg
72 kg
720 kg
7200 kg
11.
Which of the following forces is mainly reduced when a lubricant is applied to the moving parts of an engine?
Gravitational force
Magnetic force
Frictional force
Centripetal force
12.
A car of mass 1600 kg moves with a velocity of 80 ms-1.
Determine the momentum of the car.
1.28 x 106 kg ms-1
3.2 x 104 kg ms-1
6.4 x 104 kg ms-1
1.28 x 105 kg ms-1
13.
Methods of reducing friction in machines include
I. use of ball bearings
II. use of lubricants
III. use of cooling agents
Which of the following statements above are correct?
I and II only
I and III only
II and III only
I, II and III
14.
An athlete runs an 800 m race in 4 minutes and 40 seconds. Calculate the average speed of the athlete.
2.86 m-1
3.33 m-1
4.25 m-1
6.28 m-1
15.
An object weighs 20 N in air and when immersed in a liquid it displaces 0.5 kg of the liquid.
Calculate the upthrust on the object.
[g = 10 ms-2]
40.0 N
15.0 N
10.0 N
5.0 N
16.
A body of mass 20 kg falls from a height of 10 m. If g = 10.0 ms-2, calculate the velocity of the body just before it touches the ground.
10.0 ms-1
14.0 ms-1
20.0 ms-1
24.3 ms-1
17.
A force moves a body through a distance of 15 m in the direction of the force. If the work done by the force is 45.0 J, determine the magnitude of the force.
3.00 N
3.15 N
6.00 N
6.75 N
18.
A body has a mass of 70 kg. What is the force due to the earth acting on it? [g = 10 ms-2]
3500 N
700 N
70 N
7000 N
19.
Which of the following motions is rotational
An athlete running a 100 m race
A swinging pendulum
The earth moving round on its axis
The earth moving round the sun
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