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QUESTION TWO (a) Define linear momentum, elastic collision and inelastic collision. [2, 2, 2] (b) State the law of conservation of linear momentum. [2] (c) A tennis ball of mass 40 g , moving to the right with a speed of \( 5 \mathrm{~m} / \mathrm{s} \), has an elastic collision with a target ball of mass 60 g that was at rest. What is the velocity of each ball after the collision? [7] (d) A car of mass 800 kg travelling due north collides with a truck of mass 2000 kg travelling due east. After an investigation by the traffic police, it was determined that the truck was travelling at \( 36 \mathrm{~km} / \mathrm{h} \) before the collision. After the collision the car and the truck stick together and move in the direction \( 53^{\circ} \) North of East. Neglecting friction, determine (i) their common speed after the impact (ii) the velocity of the car before the collision [5] [5] Page 2 of 4

          QUESTION TWO
(a) Define linear momentum, elastic collision and inelastic collision.

[2, 2, 2]
(b) State the law of conservation of linear momentum.

[2]
(c) A tennis ball of mass 40 g , moving to the right with a speed of \( 5 \mathrm{~m} / \mathrm{s} \), has an elastic collision with a target ball of mass 60 g that was at rest. What is the velocity of each ball after the collision?

[7]
(d) A car of mass 800 kg travelling due north collides with a truck of mass 2000 kg travelling due east. After an investigation by the traffic police, it was determined that the truck was travelling at \( 36 \mathrm{~km} / \mathrm{h} \) before the collision. After the collision the car and the truck stick together and move in the direction \( 53^{\circ} \) North of East. Neglecting friction, determine
(i) their common speed after the impact
(ii) the velocity of the car before the collision

[5]
[5]
Page 2 of 4

QUESTION TWO
(a) Define linear momentum, elastic collision and inelastic collision.

[2, 2, 2]
(b) State the law of conservation of linear momentum.

[2]
(c) A tennis ball of mass 40 g , moving to the right with a speed of 5 m / s, has an elastic collision with a target ball of mass 60 g that was at rest. What is the velocity of each ball after the collision?

[7]
(d) A car of mass 800 kg travelling due north collides with a truck of mass 2000 kg travelling due east. After an investigation by the traffic police, it was determined that the truck was travelling at 36 km / h before the collision. After the collision the car and the truck stick together and move in the direction 53^∘ North of East. Neglecting friction, determine
(i) their common speed after the impact
(ii) the velocity of the car before the collision

[5]
[5]
Page 2 of 4

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