MCQ’S ON KINEMATICS & GRAVITATION
Q- Below is the distance-time curve traced by the particle. What is the maximum instantaneous velocity of the particle around the point
(a) D
(b) B
(c) A
(d) C
Answer: (d) C
Q- Which of the following statement is true if a body moves in a semicircular track whose radius is R
(a) 2R is the displacement of the body
(b) πR is the distance travelled by the body
(c) Both (a) and (b) are correct
(d) None of the above
Answer: (c) Both (a) and (b) are correct
Q- What does the area under acceleration-time graph represent for any given time interval
(a) Final velocity
(b) Distance travelled
(c) Change in the velocity in that time interval
(d) Displacement of the particle
Answer: (c) Change in the velocity in that time interval
Q- When can we say that the resultant of the two vectors is maximum
(a) When the vectors are acting in the opposite direction
(b) Both the vectors are acting in the same direction
(c) When the vectors are at right angles
(d) When the vectors are parallel to each other
Answer: (b) Both the vectors are acting in the same direction
Q- What happens to the gravitational potential at the centre of the uniform spherical shell which shrinks gradually?
(a) Remains constant
(b) Decreases
(c) Increases
(d) Oscillates
Answer: (b) Decreases
Q- Choose the factor on which the orbital velocity does not depend when the satellite is orbiting close to the earth’s surface
(a) The mass of the earth
(b) The mass of the satellite
(c) The orbital radius
(d) The radius of the earth
Answer: (b) The mass of the satellite
Q- The atmosphere around the earth is held by
(a) Gravity
(b) Winds
(c) Clouds
(d) None of the above
Answer: (a) Gravity
