| University | National University of Singapore (NUS) |
| Subject | Physics |
1. At the instant shown in Figure 1 below, car B travels by a speed of 15 m/s, which is increasing at a constant rate of 2 m/s2, while car C travels with a speed of 15 m/s, which is increasing at a constant rate of 3 m/s2. Determine :
a. the velocity of car B with respect to car A,
b. the velocity of car C with respect to car A.
2. When the 5 kg box reaches point A it has a speed of I, A = 2 m/s. Determine the angle 61 at which it leaves the smooth circular ramp at B and the distance s to where it falls into the cart. Neglect the friction.
3. The 1 kg ball is given a horizontal velocity of 1.2 m/s at A. Photographic measurements indicate that b = 1.2 m, h = 1.3 m, and the duration of the bounce at B is 0.1 s. What are the components of the average impulsive force exerted on the ball by the floor at B?
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