CAIE A-Level Physics AS 3.1.3 Linear Momentum As the Product of Mass and Velocity Questions

Calculate linear momentum as the product of mass and velocity, including vector direction.

Exam points

Calculate linear momentum as the product of mass and velocity, including vector direction.

[Maximum number: 2]

A child's toy uses the spring in (a) to launch a ball of mass 0.020 kg vertically into the air. The ball is initially held against one end of the spring which has a compression of 0.045 m . The spring is then released to launch the ball. The kinetic energy of the ball as it leaves the toy is 0.72 J .

Determine the initial momentum of the ball as it leaves the toy.

momentum =

$E=\frac{1}{2} m v^{2}$
p=m v
$\begin{aligned} 0.72=1 / 2 \times 0.020 \times v^{2} \text { and } p=0.020 \times v p=0.17 \mathrm{Ns} \end{aligned}$

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CAIE A-Level Physics AS 3.1.3 Linear Momentum As the Product of Mass and Velocity Questions question 1