Worksheetsphysics chap 2 form 4
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Which of the following is the units of momentum?
a)
Ns
b)
kg ms-2
c)
kg s-2
d)
kg-1s-2
2.
A car of mass 800 kg is moving at a velocity of 50 ms-1 The momentum of the car is
a)
0.625 kg ms-1
b)
4 kg ms-1
c)
16 kg ms-1
d)
40000 kg ms-1
3.
A ball of mass 0.5 kg hits the wall with a velocity of 4 ms-1 and bounces back with a velocity of 3 ms-1. What is the magnitude of the change of momentum?
a)
2.0 Ns
b)
1.5 Ns
c)
0.5 Ns
d)
3.5 Ns
4.
The diagram shows two objects A and B of masses 3 kg and 2 kg respectively moving towards each other. Which of the following is not true? [ The positive sign if moves to the right and negative sign if moves to the left ]
a)
The total of momentum before collision + 3 kg ms-1
b)
The total of momentum after collision + 3 kg ms-1
c)
The momentum of object A before collision is + 15 kg ms-1
d)
The momentum of object B before collision is + 12 kg ms-1
5.
A man of mass 60 kg runs and suddenly jumps to a trolley of mass 30 kg moves with a velocity of 3 ms-1 in the same direction. After collision the man and the trolley move together with a common velocity of 7 ms-1 . What is the velocity of the man before collision?
a)
3 ms-1
b)
5 ms-1
c)
7 ms-1
d)
9 ms-1
6.
A bullet of mass 10 g is shot horizontally wit a velocity of 200 ms-1 so that it hits an initially stationary block of wood. The bullet enters the block of wood and they move together with a common velocity of 2.0 ms-1 What is the mass of the block of wood.
a)
860 g
b)
990 g
c)
1000 g
d)
1020 g
7.
Two trolleys of masses 2 kg and 3 kg respectively moving towards each other. Both of the trolleys are moving at same velocity of2ms-1. After collision they stick together with a common velocity. What is the common velocity of the trolleys ?
a)
2 ms-1 in the original direction of the trolley of mass 2kg
b)
2 ms-1 in the original direction of the trolley of mass 3kg
c)
0.4 ms-1 in the opposite direction of the trolley 2 kg
d)
0.4 ms-1 in the opposite direction of the trolley 3 kg
8.
Diagram shows two trolleys P and Q of masses 1 kg respectively. After collision they stick together with a common velocity , V . What is the magnitude of V.
a)
2.5 ms-1
b)
5.0 ms-1
c)
7.5 ms-1
d)
15.0 ms-1
9.
Two objects M and N of masses 4 kg and 2 kg respectively. Both the objects travel towards each other with velocities of 6 ms-1 and 1 ms-1 respectively. After collision object N moves in the opposite direction as its original direction with the velocity of 5 ms-1. What is the velocity and the direction of motion of object M after collision ?
a)
3 ms-1 is the same direction as the object M
b)
3 ms-1 is the opposite direction as the object M
c)
6 ms-1 is same direction as the object M
d)
6 ms-1 is the opposite direction as the object M
10.
A bullet of mass 0.01 kg is fired from a rifle of mass 2 kg. The recoil velocity of the rifle is 1.25 ms-1,what is the velocity of the bullet ?
a)
100 ms-1
b)
150 ms-1
c)
200 ms-1
d)
250 ms-1
100 %
