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Mechanics 1
Applying Newton’s second law along a line
Section 1: Introduction
Multiple Choice test
Throughout this test, assume g = 9.8ms −1
1) The force needed to accelerate a particle of mass 5 kg at 2 ms-2 is
(a) 10 N
(c) 2.5 N
(e) I don’t know
(b) 98 N
(d) 0.04 N
2) A force of 200 N acts on a car of mass 800 kg. The acceleration of the car is
(a) 4 ms-2
(c) 0.25 ms-2
(e) I don’t know
(b) 16000 ms-2
(d) 0.025 ms-2
3) A lift of mass 200 kg is moving upwards at a constant velocity of 2 ms-1. The
tension in the rope lifting the lift is
(a) 400 N
(c) 1560 N
(e) I don’t know
(b) 2360 N
(d) 1960 N
4) The tension in a cable, which is lifting a load with an acceleration of 1.2 ms-2, is
11000 N. The mass of the load is
(a) 9167 kg
(c) 1000 kg
(e) I don’t know
(b) 98000 N
(d) 13200 kg
5) During lift-off an a 100 kg astronaut experiences a contact force of 8000 N from
the seat. The acceleration of the rocket is
(a) 80 ms-2
(c) 70.2 ms-2
(e) I don’t know
(b) 8.98 ms-2
(d) 47 ms-2
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6) The force required to accelerate a car of mass 800 kg at 2ms-2 against a resistance
of 1000 N is
(a) 600 N
(c) 400 N
(e) I don’t know
(b) 2600 N
(d) 900 N
7) A tug tows a barge of mass 10 000 kg with an acceleration of 0.1 ms-2. The water
resistance to the movement of the barge is 1000 N. The towrope is horizontal.
The tension in the rope is
(a) 2000 N
(c) 1500 N
(e) I don’t know
(b) 3000 N
(d) 980 N
8) A lorry weighing 3 tonnes is travelling at 10 ms-1. The force needed to stop it in
10 seconds is
(a) 306 N
(c) 29400 N
(e) I don’t know
(b) 2000 N
(d) 3000 N
9) A lorry weighing 3 tonnes is travelling at 10 ms-1. The force needed to stop it in
10 m is
(a) 600 N
(c) 1531 N
(e) I don’t know
(b) 15000 N
(d) 568 N
10) A miners’ cage of mass 420 kg contains 3 miners of total mass 280 kg. The cage
is lowered from rest by a cable. For the first 10 seconds the cage accelerates
uniformly and descends a distance of 75 m. The force in the cable during the first
10 seconds is
(a) 5250 N
(c) 5810 N
(e) I don’t know
(b) 6860 N
(d) 7910 N
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Mechanics 1
Applying Newton’s second law along a line
Section 1: Introduction
Multiple choice test solutions
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