A body of a mass 100g moving with a velocity of 10ms-1collides with a wall.if after the collision,it moves with a velocity of 2.0ms-1 in the opposite direction, calculate the change in momentum
The change in momentum can be calculated using the formula:
change in momentum = final momentum - initial momentum
The initial momentum of the object can be calculated by multiplying its mass and initial velocity:
initial momentum = mass * initial velocity
final momentum can be calculated by multiplying the mass and final velocity:
final momentum = mass * final velocity
Given:
Mass of the body = 100g = 0.1kg
Initial velocity = 10 m/s
Final velocity = 2.0 m/s
Therefore,
Initial momentum = 0.1kg * 10 m/s = 1 kgm/s
Final momentum = 0.1kg * 2.0 m/s = 0.2 kgm/s
Change in momentum = final momentum - initial momentum
= 0.2 kgm/s - 1 kgm/s
= -0.8 kgm/s
So, the change in momentum is -0.8 kgm/s.