Question

8. A 3.0 x 10' g nerf projectile is fired from a 1.5 kg nerf gun. If the velocity of the projectile is

Answer 1

Answer:

$v_g=0.2\ m.s^{-1}$

Explanation:

Given:

• mass of nerf projectile, $m_p=30\ g=0.03\ kg$

• velocity of nerf projectile, $v_p=10\ m.s^{-1}$

• mass of the gun, $m_g=1.5\ kg$

Now in this case the collision can be assumed to be perfectly elastic.

For an elastic collision:

$m_p.v_p=m_g.v_g$

where:

$v_g=$ recoil velocity of the gun

$0.03\times 10=1.5\times v_g$

$v_g=0.2\ m.s^{-1}$