Answer:
The centripetal force is 0.54 N.
Explanation:
mass, m = 0.56 kg
radius, r = 0.72 m
angular speed, w = 1.155 rad/s
The centripetal force is given by

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Explanation :
There are two types of collision i.e. elastic and elastic collision.
- Elastic collision : In this type of collision, the total momentum and the kinetic energy of the particles remains constant.
- Inelastic collision : In this type of collision, only the momentum remains constant while there is some loss of kinetic energy occurs.
From Newton's second law,
F = m a
a is the rate of change of velocity.

There is a inverse relation between the force and the time of collision.
The change in <em><u>momentum</u></em> will remain the same during a collision, the force needed to bring an object to a stop can be <em><u>increased</u></em> if the time of the collision is <u><em>decreased</em></u>.
Explanation:
Given parameters:
Force applied = 150N
Time = 2s
Unknown:
Momentum change = ?
Solution:
The momentum change of a body is the difference between its initial and final momentum.
Momentum is the same as the impulse exerted on a body which is the product of force and time
Momentum = mass x velocity = force x time
The body initially at rest has a momentum of 0, as the momentum changes;
Momentum change = Final momentum - initial momentum
= f x t - (0)
= (150 x 2) - 0
Momentum change = 300kgm/s
Since the body is a frictionless surface, the net force is the same as the applied force.
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