1. A ball whose kinetic energy is E, is projected at an angle of 45 to...

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1. A ball whose kinetic energy is E, is projected at an angle of 45° to the horizontal. The kinetic energy of the ball at the highest point of its flight will be (2002) 1) E 2) E/2 3) E/2 4) zero 2. From a building two balls A and B are thrown such that A is thrown upwards and B downwards (both vertically). If V and V, are their respective velocities on reaching the B. ground, then (2002) 1) V>V B 2) V = V, 3) V, > V, 4) their velocities depens on their masses 3. If a body looses half of its velocity on penetrating 3cm in a wooden block, then how much will it penetrate more before coming to rest ? (2002) 1) 1 cm 2) 2cm 3) 3 cm 4) 4 cm 4. Speeds of two identical cars are u and 4u at the specific instant. The ratio of the respective distances in which the two cars are stopped from that instant is (2002) 2) 1:4 3) 1:8 4) 1: 16 5. A car moving with a speed of 50 km/hr, can be stopped by brakes after at least 6 m. If the same car is moving at a speed of 100 km/hr, the minimum stopping distance is (2003) 1) 12 m 2) 18 m 3) 24 m 4)6 m 1. A ball whose kinetic energy is E, is projected at an angle of 45° to the horizontal. The kinetic energy of the ball at the highest point of its flight will be (2002) 1) E 2) E/2 3) E/2 4) zero 2. From a building two balls A and B are thrown such that A is thrown upwards and B downwards (both vertically). If V and V, are their respective velocities on reaching the B. ground, then (2002) 1) V>V B 2) V = V, 3) V, > V, 4) their velocities depens on their masses 3. If a body looses half of its velocity on penetrating 3cm in a wooden block, then how much will it penetrate more before coming to rest ? (2002) 1) 1 cm 2) 2cm 3) 3 cm 4) 4 cm 4. Speeds of two identical cars are u and 4u at the specific instant. The ratio of the respective distances in which the two cars are stopped from that instant is (2002) 2) 1:4 3) 1:8 4) 1: 16 5. A car moving with a speed of 50 km/hr, can be stopped by brakes after at least 6 m. If the same car is moving at a speed of 100 km/hr, the minimum stopping distance is (2003) 1) 12 m 2) 18 m 3) 24 m 4)6 m