Question

The speed of a car of mass 2000kg increases from 50m/s to 70m/s. Calculate the change in momentum.​

Answer 1

momentum = m ( v - u)

momentum = 2000 ( 70- 50 )

momentum = 2000 (20)

momentum = 40000kg m /s

v. = 70

u = 50

hope you understand it

Answer 2

Required Answer :-

Given :-

• Mass (m) = 2000kg
• Speed $\sf{ {v}_{1}}$ = 50m/s
• Speed $\sf{ {v}_{2}}$ = 70m/s

To find :-

• change in momentum

Solution :-

Now,

The change in momentum

$:\implies\sf ΔP=m(Δv)$

$:\implies\sf ΔP=m \times ({v}_{2} - {v}_{1})$

$:\implies\sf ΔP=2000 \times 20$

$:\implies\sf ΔP=40000$

$:\implies\sf ΔP=4 \times {10}^{4} kgm/s$

Change in momentum = 4 × 10⁴ kgm/s