Question

Part 1: Multiple choice questions: write your answer on space provided. For MC4 and 5 assume down is negative and up is positive. (5 marks) 1. Which of the following is true about distance and displacement? a) Distance is always less than or equal to displacement b) Distance and displacement are always equal c) Distance and displacement are never equal d) Distance is always greater than or equal to displacement 2. Suppose that an object is moving with constant acceleration. Make a statement concerning the changes in its motion over time. a) In equal time intervals, its speed changes by equal amounts b) In equal time intervals, its velocity changes by equal amounts c) In equal time intervals, it undergoes equal displacements d) In equal time intervals, it moves equal distances 3. If the position versus time graph of an object is a non-zero horizontal line, the object is: a) Moving with a constant non-zero speed b) Moving with constant non-zero acceleration c) At rest d) Moving with infinite speed 4. A Ball is thrown from a height of 2.0 m above the ground straight upwards at a velocity of 40 m/s. What will be the velocity of the ball when it falls back to its original height of 2.Om off the ground? Ignore air resistance. a) > 40 m/s b) 40 m/s c) Om/s d) -40 m/s e) < 40 m/s 5. A stone is thrown straight up into the air and allowed to fall back down. Which of the following statements are true? a) Its acceleration is equal to zero b) Its acceleration is always positive c) Its acceleration is always negative d) Its velocity is always positive

Answer 1

Ans:- J displacement is shortest distance possible between initial and final position. (d) 3) (6) āAV at Velocity changes by equal amount in equal time = Const time intervals. 3 (c) At rest as slope of position - time is zero so velocity is zero- 44 (d) V² 4²+295 SO u q zom! OJV Jam Vt4 & 40m/s Ans 5) alg And (C) always negative.