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WorksheetsIB Physics Final Topic 2
Total questions: 17
Worksheet time: 34mins
Name
Class
Date
1.
A cyclist is travelling due south with velocity u. The wind is blowing from the north-east with velocity w. cyclist u wind The wind has a velocity v relative to the cyclist, where v = w – u.
Which vector diagram shows the magnitude and direction of velocity v?
Which vector diagram shows the magnitude and direction of velocity v?
a)
A
b)
B
c)
C
d)
D
2.
A double-ended launching device fires two identical steel balls X and Y at exactly the same time. The diagram shows the initial velocities of the balls. They are both launched horizontally, but Y has greater speed.
Which statement explains what an observer would see?
Which statement explains what an observer would see?
a)
Both X and Y reach the ground simultaneously, because air resistance will cause both to have the same final speed.
b)
Both X and Y reach the ground simultaneously, because gravitational acceleration is the same for both.
c)
X reaches the ground before Y, because X lands nearer to the launcher.
d)
Y reaches the ground before X, because Y has greater initial speed.
3.
At time t = 0, a body moves from rest with constant acceleration in a straight line. At time t, the body is distance s from its rest position.
A graph is drawn of s against t2, as shown.
Which statement describes the acceleration of the body?
A graph is drawn of s against t2, as shown.
Which statement describes the acceleration of the body?
a)
It is equal to half the value of the gradient of the graph.
b)
It is equal to the value of the gradient of the graph.
c)
It is equal to twice the value of the gradient of the graph.
d)
It is equal to the reciprocal of the gradient of the graph.
4.
A lift (elevator) consists of a passenger car supported by a cable which runs over a light, frictionless pulley to a balancing weight. The balancing weight falls as the passenger car rises.
What is the magnitude of the acceleration of the car when carrying just one passenger and when the pulley is free to rotate?
What is the magnitude of the acceleration of the car when carrying just one passenger and when the pulley is free to rotate?
a)
0.032 ms–2
b)
0.32 ms–2
c)
0.6 ms–2
d)
0.65 ms–2
5.
A wooden block rests on a rough board. The end of the board is then raised until the block slides down the plane of the board at constant velocity v.
Which row describes the forces acting on the block when sliding with constant velocity?
Which row describes the forces acting on the block when sliding with constant velocity?
a)
A
b)
B
c)
C
d)
D
6.
A ball of mass m is thrown up to height h in air with an initial velocity v, as shown.
Air resistance is considered negligible. The acceleration of free fall is g. What is the total work done by the gravitational force on the ball during its flight from P to Q?
Air resistance is considered negligible. The acceleration of free fall is g. What is the total work done by the gravitational force on the ball during its flight from P to Q?
a)
zero
b)
½mv2
c)
mgh
d)
2 mgh
7.
A spring of unextended length 40 mm is suspended from a fixed point. A load of 16 N is applied to the free end of the spring. This causes the spring to extend so that its final length is five times its original length. The spring obeys Hooke’s Law.
What is the energy stored in the spring due to this extension?
What is the energy stored in the spring due to this extension?
a)
1.3 J
b)
1.6 J
c)
2.6 J
d)
3.2 J
8.
The diagram shows an arrangement used to find the output power of an electric motor. The wheel attached to the motor’s axle has a circumference of 0.5 m and the belt which passes over it is stationary when the weights have the values shown.
If the wheel is making 20 revolutions per second, what is the output power of the motor?
If the wheel is making 20 revolutions per second, what is the output power of the motor?
a)
300 W
b)
500 W
c)
600 W
d)
700 W
9.
A ball is dropped from rest at time t = 0 on to a horizontal surface from which it rebounds. Which one of the following graphs best shows the variation of speed v of the ball with time t from the time t = 0 to the time that the ball leaves the surface?
a)
A
b)
B
c)
C
d)
D
10.
Which one of the following is a true statement concerning the vertical component of the velocity and the acceleration of a projectile when it is at its maximum height?
a)
A
b)
B
c)
C
d)
D
11.
The acceleration of free fall of a small sphere of mass 5.0 10−3 kg when close to the surface of Jupiter is 25 ms−2 . The gravitational field strength at the surface of Jupiter is
a)
2.0 × 10−4 Nkg−1
b)
1.3 × 10−1 N kg−1
c)
25 N kg−1
d)
5.0 × 103 Nkg−1
12.
A block rests on a rough horizontal plane and a force P is applied to the block as shown.
The normal reaction between the plane and the block is N and the frictional force between the block and the plane is F. The coefficient of static friction between the block and the plane is μS and initially P is zero.
As P is increased in value, which one of the following statements is true concerning the relationship between F, N and μS ?
The normal reaction between the plane and the block is N and the frictional force between the block and the plane is F. The coefficient of static friction between the block and the plane is μS and initially P is zero.
As P is increased in value, which one of the following statements is true concerning the relationship between F, N and μS ?
a)
F is always equal to μSN
b)
F is always greater than μSN
c)
F is always less than μSN
d)
F can be equal to μSN
13.
The area between the line of the graph and the time-axis represents
a)
the average velocity of the object.
b)
the displacement of the object.
c)
the impulse acting on the object.
d)
the work done on the object.
14.
Which one of the following graphs shows the corresponding variation with time t of the acceleration a of the object?
a)
A
b)
B
c)
C
d)
D
15.
An astronaut in outer space is holding a hammer and drifting at constant velocity. The astronaut throws the hammer in the opposite direction to that in which she is drifting. What change, if any, occurs in the total kinetic energy and the total momentum of the astronaut and hammer?
a)
A
b)
B
c)
C
d)
D
16.
A constant force is applied to a ball of mass m. The velocity of the ball changes from v1 to v2 . The impulse received by the ball is
a)
m(v2 +v1)
b)
m(v2 −v1)
c)
m(v22 + v12 )
d)
m(v22 − v12 )
17.
An electric train develops a power of 1.0 MW when travelling at a constant speed of 50ms−1. The net resistive force acting on the train is . . . .
a)
50 MN
b)
200 kN
c)
20 kN
d)
200 N
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