Related InterviewSolutions

• A particle moves with uniform velocity. Which of the following statements about the motion of the particle is true. (a) its speed is zero. (b) its acceleration is zero. (c) its acceleration is opposite to the velocity. (d) its speed may be variable
• The displacement of a particle is given by √x = t + 1. which of the following statements about its velocity is true.(a) it is zero. (b) it is constant but not zero. (c) it increases with time (d) it decreases with time
• The initial velocity of a particle moving along a straight line is 10 m/s and its retardation is 2 ms-2. the distance moved by the particle in the fifth second of its motion is :(a) 1 m (b) 19 m(c) 50 m (d) 75 m
• A particle moves along X-axis in such a way that its coordinate X varies with the time t according to the expressions x = (8 – 5t + 8t2) meter. The initial velocity of the particle is (a) -5 m/s(b) 8 m/s(c) -8m/s(d) +16 m/s
• The acceleration a of a particle varies with time t as a = bt +c. where b and c are constants. What will be the velocity of the particle which starts from rest after the time t. (a) bt + (1/2)ct2 (b) ct + (1/2)bt2(c) bt + ct2(d) ct + bt2
• If the displacement of a particle is zero, then what can we say about its distance covered ? (a) it must be zero. (b) it cannot be zero. (c) it is negative (d) it may or may not be zero.
• A ball is dropped from the top of tower 100m high. Simultaneously another ball is thrown upward with a sped of 50 ms-1. after what time do they cross each other. (a) 1s (b) 2s (c) 3s (d) 4s.
• Two bodies are dropped from different heights h1 & h2. The ratio of the times taken by them to reach the ground will be(a) h22 :h12. (b) h1 :h2. (c)  √h1 :√h2. (d) none of the above 
• A body is released from the top of a tower of height H meter. After 2 seconds it is stopped and then instantaneously released. What will be its height after next 2 seconds. (a) (H-5) meters. (b) (H-10) meters. (c) (H-20) meters. (d) (H-40) meters. 
• A particle is moving on a straight line path with constant acceleration directed along the direction of instantaneous velocity. Which of the following statements about the motion of particle is true. (a) Particle may reverse the direction of motion. (b) distance covered = magnitude of displacement (c) average velocity is less than average speed (d) average velocity = instantaneous velocity.