Question

A truck of weight 2500kg is moving with a velocity of 21m/s collides with a stationary car of weight 1000kg, after the impact they move together, calculate the common velocity​

Answer 1

Answer:

m1u1 + m2u2 = v(m1+m2)

2500×21+1000×0=v(2500+1000)

v=2500×21/3500

v= 52500/3500

v=15

Answer 2

Answer:

A truck of weight 2500kg is moving with a velocity of 21m/s collides with a stationary car of weight 1000kg, after the impact, they move together, the common velocity​ is 15 m/s.

Explanation:

Mass of truck$(M_1)= 2500 kg$, and Velocity $(u_1) = 21 m/s$

Mass of car $(M_2) = 1000 kg$ and $(u_2)= 0 m/s$

$m_1u_1 + m_2u_2 = (m_1 + m_2)_v$

$2500 \times 21 + 1000 \times 0 = (2500 + 1000) v$

$52,500 + 0 = 3500 v$

$v = 15 m/s$