A loaded lorry of mass 6,000 kg moves with a velocity of 6m\s . it velocity becomes 5m/s after 5s. a) what is the initial momentum . b) what is the final momentum . c) what is the change in momentum.
Answers
Answer :
a) Initial momentum = 36,000 kg.m/s
b) final momentum = 30,000 kg m/s
c) Change in momentum = 6,000 kg.m/s
Step-by-step Explanation :
Given : Mass of loaded lorry = 6,000 kg
Initial velocity = 6 m/s
Final velocity = 5 m/s
To find : a) what is the initial momentum.
b) what is the final momentum.
c) what is the change in momentum.
We know that,
Momentum = Mass × Velocity
Substituting the given value in above formula
We get,
a) Initial momentum = mass × initial velocity
= 6,000 × 6
= 36,000 kg.m/s
b) final momentum = mass × final velocity
= 6,000 × 5
= 30,000 kg.m/s
c) Change in momentum = Initial momentum - final momentum
= 36,000 - 30,000
= 6,000 kg.m/s
Answer:
a) Initial momentum = 36000 Kgm/s
b) Final momentum = 30000 Kgm/s
c) Change in momentum = -6000 Kgm/s
Explanation:
Mass of the lorry, m = 6000 Kg
Initial velocity of the lorry, u = 6 m/s
Final velocity of the lorry, v = 5 m/s
The momentum of a body of mass 'm' moving with a velocity 'v' is given by the equation:
Momentum = mass × velocity
P = m × v
So the initial momentum of the lorry is P₁ = m × u
= 6000 × 6
= 36000 Kgm/s
The final momentum of the body, P₂ = m × v
= 6000 × 5
= 30000 Kgm/s
So the change in momentum, P = P₂ - P₁
P = 30000 - 36000
P = -6000 Kgm/s
The negative sign indicates that the momentum of the lorry has been reduced.