(b) Trolley A, moving towards the right, collides with stationary trolley B. They stick together, and move off at less than half A's original speed. Which has the greater mass, trolley A or trolley B?

Calculate the momentum of each of the following objects:

(a) a $0.50 \mathrm{kg}$ Stone travelling at a velocity of $20 \mathrm{m}{\mathrm{s}}^{-1}$

Calculate the momentum of each of the following objects:

(b) a $25000 \mathrm{kg}$ bus travelling at $20 \mathrm{m}{\mathrm{s}}^{-1}$ on a road

Calculate the momentum of each of the following objects:

© An electron travelling at $2.0\times {10}^7 \mathrm{m}{\mathrm{s}}^{-1}$. (The mass of the electron is $9.1\times {10}^{-31} \mathrm{kg}$.)

Two balls, each of mass $0.50 kg$, collide as shown in Figure. Show that their total momentum before the collision is equal to their total momentum after the collision.

Copy this table, choosing the correct words from each pair.

Figure shows two identical balls A and B about to make a head-on collision. After the collision, ball A rebound at a speed of $1.5 {\mathrm{ms}}^{-1}$And ball B rebounds at a speed of $2.5 {\mathrm{ms}}^{-1}$. The mass of each ball is $4.0 \mathrm{kg}$.

(a) Calculate the momentum of each ball before the collision.

Figure shows two identical balls A and B about to make a head-on collision. After the collision, ball A rebound at a speed of $1.5 {\mathrm{ms}}^{-1}$ And ball B rebounds at a speed of $2.5 {\mathrm{ms}}^{-1}$. The mass of each ball is $4.0 \mathrm{kg}$.

(b) Calculate the momentum of each ball after the collision.

Figure shows two identical balls A and B about to make a head-on collision. After the collision, ball A rebound at a speed of $1.5 {\mathrm{ms}}^{-1}$And ball B rebounds at a speed of $2.5 {\mathrm{ms}}^{-1}$. The mass of each ball is $4.0 \mathrm{kg}$.

(c) Is the momentum conserved in the collision?