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WorksheetsMomentum and Forces DP014
Total questions: 51
Worksheet time: 28mins
kinetic energy is conserved in what type of collision?
elastic
inelastic
both elastic and inelastic
neither elastic or inelastic
A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The time for the collision is _____ seconds.
1.8
2.5
3.6
10
Using the gravity of earth at 9.81 m/s2 , how much does a person with a mass of 35 kg weigh in Newton's?
0.28 N
343 N
3.57 N
212 N
A 20 kg bike accelerates at 10 m/s2. what was the force?
25 Newtons
20 Newtons
200 Newtons
10 Newtons
If a 56 kg person on an unknown planet weighs 450 N , what must be the gravity on this planet?
8.04 kg⋅m/s
8.04 m/s2
25,200 m/s2
25,200 kg⋅m/s
Which of the following is the unit for momentum?
kg·m/s
kg·m
kg·m/s2
Momentum has no unit.
Calculate the momentum of a 55-kg running back moving forward at 10 m/s.
550 kg m/s
-550 kg m/s
5.5 kg m/s
-5.5 kg m/s
Which of the following objects has the greatest momentum?
a 7.6-kg ball moving at 6.3 m/s westward.
a 10.8-kg ball moving at 3.8 m/s eastward.
a 3.2-kg ball moving at 13.3 m/s northward.
a 5.2-kg ball moving at 8.8 m/s southward.
A 2.5 kg ball moving at 4.2 m/s collides with a 2.5 kg stationary ball. If the first ball is at rest after the collision, what is the velocity of the second ball? Elastic Collision
2.1 m/s
2.5 m/s
4.2 m/s
8.4 m/s
A dart with a mass of 0.5kg is thrown at 15m/s and sticks into a 1kg apple hanging on a string. What is the velocity of the dart and apple just after the dart is embedded? Inelastic Collision
0 m/s
5 m/s
10 m/s
15 m/s
The total momentum before a collision is _________ the total momentum after a collision.
equal to
less than
more than
It depends on the type of collision
If the net force in an object is 0, then it will do as below EXCEPT?
move with constant velocity
move with non zero acceleration
stay at rest
Which is takes more force to catch, a bowling ball or a ping pong ball?
Bowling ball ball because it has more momentum
Ping pong ball because it has more momentum
Both require the same amount of force when catching
Bowling ball because it has less momentum
When the speed of an object is doubled, its momentum _______
remains unchanged in accord with the conservation of momentum.
doubles.
quadruples.
decreases.
How can a tennis ball and a bowling ball have the same momentum?
Have the same speed
Have different speeds
One is moving backwards.
Have the same mass.
The impulse-momentum theorem states that ________
the impulse on an object is equal to the change in momentum it causes.
the force on a moving object is equal to the magnitude of the impulse.
the impulse on an object is greater than the change in momentum it causes.
The impulse on an object is less than the change in momentum it causes.
_________ is equal to a change in momentum.
Impulse
Force
Momentum
Velocity
What is the collision in which both momentum and kinetic energy are conserved?
Inelastic collision
Elastic collision
Which of the following is NOT a force?
Applied force
Normal force
Tension
Gravitational force
FIGURE 1 shows a block of mass m at rest on a rough plane. How many forces (basic) react on this block?
2
3
4
5
In which direction does gravity act?
Downwards
Upwards
In all direction
Towards the center of the Earth
The inertia of a body is a measure of its………
Mass
Impulse
Velocity
momentum
“Rate of change of momentum of an object is directly proportional to the net force acting on it”
This statement is related to _________
Newton’s First Law.
Newton’s Second Law.
Newton’s Third Law.
Conservation of Linear Momentum
A book is placed on a chair. Then a video cassette is placed on the book. The floor exerts a normal force
on all three
only on the book
only on the chair
upwards on the chair and downwards on the book
When you paddle a canoe, the canoe goes forward. This is an example of...............
Newton's First Law of Motion
Newton's Second Law of Motion
Newton's Third Law of Motion
When a pair of balanced forces acts on an object, the net force is .......
greater in size than one of the forces.
equal to zero.
equal in size to one of the forces.
greater in size than both forces combined.
According to Newton’s third law of motion, when a hammer strikes and exerts a force on a nail, the nail
disappears into the wood.
exerts an equal force back on the hammer.
moves at a constant speed.
creates a friction with the hammer.
The momentum of an object depends upon the object’s _______ and _______.
size and shape
mass and shape
mass and velocity
shape and velocity
_________ is equal to a change in momentum.
Impulse
Force
Momentum
Velocity
If 2 objects collide and stick together, what will happen to their velocities?
Velocities will increase.
Velocities will decrease
Velocities will stay the same
Velocities is equal to zero
In which direction does gravity act?
Downwards
Upwards
In all direction
Towards the center of the Earth
FIGURE 1 shows a block of mass m at rest on a rough plane. How many forces (basic) react on this block?
2
3
4
5
Which of the statements is NOT related to the Newton’s Laws?
The total force on an object is zero if the velocity of the object is constant.
The net force on object is zero if the object is stationary.
The acceleration of an object is proportional to the force applied.
The momentum of an object is proportional to the mass of the object.
