Question

A ball is falling freely from a tower of height 5m. how much momentum does it transfer to the Flor if it's mass in 500g. take a=10mper .sec

Answer 1

Answer:

Hey mate! here is your answer

Explanation:

ANSWER

Given,

Height of tower = 5m

Mass of body = 500g =0.5kg

Initial velocity, u = 0m/s

Acceleration, a = 10m/s^2s2

Now

to find the final velocity of body we will use the 3rd law of Kinematics =>

V^2 - u^2 = 2a×s

=> V^2 - 0 = 2(10)×(5)

=>V^2 = 100

=> V = 10m/s.

Hence the final velocity of body is

10m/s.

Now we know that =>

Momentum, p = mass × velocity

=>p = m × v

=>p = 0.5 × 10

=>p = 5kg m/s

Hence the momentum of body is

5kgm/s.

Now we know that =>

Kinetic energy = 1/2 × m × v^2

=>K. E = 1/2 × 0.5 × 100

=> K. E = 25 joules.

Hence the body will have an kinetic energy of 25J which will be transfered.