A body of mass 5 kg is acted on by a net force of magnitude
When
- 10
- 14
- 35
- 70
- 175
Mechanics, SPEC2 2020 VCAA 20 MC
An object of mass 2 kg is suspended from a spring balance that is inside a lift travelling downwards.
If the reading on the spring balance is 30 N, the acceleration of the lift is
upwards. downwards. downwards. upwards. downwards.
Show Worked Solution
♦ Mean mark 43%.
Mechanics, SPEC2-NHT 2019 VCAA 15 MC
A lift accelerates from rest at a constant rate until it reaches a speed of 3 ms−1. It continues at this speed for 10 seconds and then decelerates at a constant rate before coming to rest. The total travel time for the lift is 30 seconds.
The total distance, in metres, travelled by the lift is
- 30
- 45
- 60
- 75
- 90
Show Worked Solution
Mechanics, SPEC2-NHT 2019 VCAA 17 MC
A ball is thrown vertically upwards with an initial velocity of
The maximum height, in metres, reached by the ball is
Mechanics, SPEC2-NHT 2019 VCAA 16 MC
An object of mass 2 kg is travelling horizontally in a straight line at a constant velocity of magnitude 2 ms−1. The object is hit in such a way that it deflects 30° from its original path, continuing at the same speed in a straight line.
The magnitude, correct to two decimal places, of the change of momentum, in kg ms−1, of the object is
- 0.00
- 0.24
- 1.04
- 1.46
- 2.07
Mechanics, SPEC2 2012 VCAA 21 MC
A particle of mass 3 kg is acted on by a variable force, so that its velocity
The force acting on the particle when
A. 4
B. 12
C. 16
D. 36
E. 48
Mechanics, SPEC2 2011 VCAA 21 MC
A constant force of magnitude
It follows that
= 4.5 = 9.0 = 12.0 = 18.0 = 19.6
Mechanics, SPEC2 2013 VCAA 21 MC
A particle of mass 2 kg moves in a straight line with an initial velocity of 20 m/s. A constant force opposing the direction of the motion acts on the particle so that after 4 seconds its velocity is 2 m/s.
The magnitude of the force, in newtons, is
A. 4.5
B. 6
C. 9
D. 18
E. 36
Mechanics, SPEC2 2013 VCAA 20 MC
A 5 kg parcel is on the floor of a lift that is accelerating downwards at 3 m/s².
The reaction, in newtons, of the floor of the lift on the parcel is
A.
B.
C.
D.
E.
Mechanics, SPEC2 2016 VCAA 17 MC
A body of mass 3 kg is moving to the left in a straight line at 2
The change in momentum of the particle, in kg
A. − 6
B. 0
C. 4
D. 6
E. 12
Mechanics, SPEC2 2016 VCAA 15 MC
A variable force of
It follows that
A.
B.
C.
D.
E.
Mechanics, SPEC2-NHT 2017 VCAA 16 MC
A person of mass
The force of the lift floor acting on the person has magnitude
A.
B.
C.
D.
E.
Show Worked Solution
Mechanics, SPEC1-NHT 2017 VCAA 8
A 3 kg mass has velocity
Find the net force,
Mechanics, SPEC1 2015 VCAA 2
A 20 kg parcel sits on the floor of a lift.
- The lift is accelerating upwards at 1.2 ms¯².
Find the reaction force of the lift floor on the parcel in newtons. (2 marks)
- Find the acceleration of the lift downwards in ms¯² so that the reaction of the lift floor on the parcel is 166 N. (2 marks)
Show Worked Solution
| a. |  |
b.
Mechanics, SPEC2-NHT 2018 VCAA 16 MC
A body of mass 2 kg is moving in a straight line with constant velocity when an external force of
If the body experiences a change in momentum of 40 kg ms¯¹, then
A. 3
B. 4
C. 5
D. 6
E. 7
Mechanics, SPEC2-NHT 2018 VCAA 15 MC
An 80 kg person stands in an elevator that is accelerating downwards at
The reaction force of the elevator floor on the person, in newtons, is
A. 688
B. 704
C. 784
D. 880
E. 896
Show Worked Solution
Mechanics, SPEC2 2018 VCAA 17 MC
A tourist standing in the basket of a hot air balloon is ascending at 2 ms¯¹. The tourist drops a camera over the side when the balloon is 50 m above the ground.
Neglecting air resistance, the time in seconds, correct to the nearest tenth of a second, taken for the camera to hit the ground is
A. 2.3
B. 2.4
C. 3.0
D. 3.2
E. 3.4
Mechanics, SPEC2 2018 VCAA 15 MC
A constant force of magnitude
The magnitude of
A. 9.8
B. 12.5
C. 12.8
D. 100
E. 102.4