# CBSE Class 11 Physics Motion In A Straight Line MCQ with Answers PDF

CBSE MCQ Questions for Class 11 Physics Chapter 3 Motion In A Straight Line with Answers Pdf free download. MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. This MCQ will help you score good marks in the final exam. Motion In A Straight Line Class 11 Physics MCQs are prepared for a better understanding of the concept. Motion In A Straight Line Class 11 Physics MCQ is prepared by Experts of CBSE.

# Class 11 Physics Chapter 3 Motion In A Straight Line MCQs

Check the multiple-choice questions for the 11th Class Physics Chapter 3 Motion In A Straight Line. Select one answer out of 4 options.

The dimensional formula for speed is
(a) T-1
(b) LT-1
(c) L-1T-1
(d) L-1T

A body starts from rest and travels with uniform acceleration a to make a displacement of 6 m. If its velocity after making the displacement is 6 m/s, then its uniform acceleration a is
(a) 6 m/s²
(b) 2 m/s²
(c) 3 m/s²
(d) 4 m/s²

The displacement in metres of a body varies with time t in second as y = t2 – t – 2. The displacement is zero for a positive of t equal to
(a) 1 s
(b) 2 s
(c) 3 s
(d) 4 s

A 180 metre long train is moving due north at a speed of 25 m/s. A small bird is flying due south, a little above the train, with a speed of 5 m/s. The time taken by the bird to cross the train is
(a) 10 s
(b) 12 s
(c) 9 s
(d) 6 s

A boy starts from a point A, travels to a point B at a distance of 1.5 km and returns to A. If he takes one hour to do so, his average velocity is
(a) 3 km/h
(b) zero
(c) 1.5 km/h
(d) 2 km/h

For the motion with uniform velocity, the slope of the velocity-time graph is equal to
(a)1 m/s
(b)Zero
(c)Initial velocity
(d)Final velocity

A particle is moving with a constant speed along a straight-line path. A force is not required to
(a)change its direction
(b)decrease its speed
(c)keep it moving with uniform velocity
(d)Increase its momentum

Answer: (c) keep it moving with uniform velocity

The ratio of the average velocity and average speed of a body is
(a)1
(b)More than 1
(c)1 or Less than 1
(d)None of the option

Answer: (c) 1 or Less than 1

Which is the formula for motion in a straight line
(a)v = u + at
(b)v = u – at
(c)u = 2at+v
(d)v = 2at+u

Answer: (a) v = u + at

The location of a particle has changed. What can we say about the displacement and the distance covered by the particle?
(a) Neither can be zero
(b) One may be zero
(c) Both may be zero
(d) One is +ve, other is –ve

Answer: (a) Neither can be zero

The numerical ratio of displacement to distance for a moving object is
(a) always less than 1
(b) always equal to 1
(c) always more than 1
(d) equal to or less than 1

Answer: (d) equal to or less than 1

The incorrect statement(s) from the following is/are
I. A body having zero velocity will not necessarily have zero acceleration
II. A body having zero velocity will necessarily have zero acceleration
III. A body having uniform speed can have only uniform acceleration
IV. A body having non-uniform velocity will have zero acceleration
(a) II, III and IV
(b) I and II
(c) II and III
(d) IV only

Answer: (a) II, III and IV

Area under velocity-time curve over a given interval of time represents
(a) acceleration
(b) momentum
(c) velocity
(d) displacement

Free fall of an object (in vacuum) is a case of motion with
(a) uniform velocity
(b) uniform acceleration
(c) variable acceleration
(d) constant momentum

The total distance travelled by the body in the given time is equal to
(a) the area which v– t graph encloses with displacement axis
(b) the area which x – t graph encloses with time axis
(c) the area which v – t graph encloses with time axis
(d) the area which a – t graph encloses with axis

Answer: (c) the area which v – t graph encloses with time axis

A body starts from rest and travels with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s . Then t is
(a) 10 s
(b) 5 s
(c) 20 s
(d) 6 s

A body starts from rest and travels with uniform acceleration on a straight line. If its velocity after making a displacement of 32 m is 8 m/s, its acceleration is
(a) 1 m/s²
(b) 2 m/s²
(c) 3 m/s²
(d) 4 m/s²

If distance covered by a particle is zero, what can you say about its displacement?
(a) It must be zero
(b) It cannot be zero
(c) It may or may not be zero
(d) It is negative

Answer: (a) It must be zero

The distance travelled by a body is directly proportional to the time taken. Its speed
(a) remains constant
(b) decreases
(c) increases
(d) becomes zero