# MCQ Class 9 Science Chapter 8 Motion

Check the below Motion Class 9 MCQ for Science Chapter 8 with Answers available with PDF free download. MCQ Questions for Class 9 Science with Answers were prepared based on the latest syllabus and examination pattern issued by CBSE, NCERT and KVS. Our teachers have provided below Motion Class 9 Science MCQs Questions with answers which will help students to revise and get more marks in exams

## Motion Class 9 Science MCQ Questions with Answers

Refer below for Motion Class 9 MCQ with solutions. Solve MCQ questions and compare them with the answers provided below

Question. A stone tied to a thread and whirled in a circular path is an example of
a. circular motion.
b. rotatory motion.
c. rectilinear motion.
d. uniform circular motion.

D

Question. If a body takes time t to complete one round of the circular path of radius r, then the speed of the body (v) is given by
a. v = πr × t
b. v =  πr / t
c. 2 πr / t
d. 2πr × t

C

Question. Which is a vector quantity?
a. Weight
b. Mass
c. Density
d. Volume

A

Question. A shot-put thrown by an athlete is said to be in
a. rectilinear motion.
b. rotatory motion.
c. curvilinear motion.
d. oscillatory motion.

C

Question. A free-falling stone under the action of gravity exhibits a
a. uniform motion.
b. non-uniform motion.
c. zigzag motion.
d. curvilinear motion.

B

Question. If a driver decreases the speed of a car from 25 m/s to 10 m/s in 5 seconds, the acceleration produced by the car is
a. –3 m s–2
b. 3 m s–2
c. 5 m s–2
d. 7 m s–2

A

Question. The distance–time graph of a body having non-uniform motion is a
a. straight line parallel to time axis.
b. straight line perpendicular to time axis.
c. curved line.
d. zigzag line.

C

Question. The SI unit of retardation is
a. m s–1
b. m s–2
c. m s2
d. m

B

Question. The average velocity of a body is equal to mean of its initial velocity and final velocity. The acceleration of the body is
a. variable.
b. zero.
c. negative.
d. uniform.

D

Question. The area under a speed–time graph represents a physical quantity which has the unit of
a. m
b. m2
c. m s–1
d. m s–2

B

Question. A bus starting from rest moves with uniform acceleration of 0.1 m/s2 for 2 minutes. The distance covered by the bus is
a. 720 m.
b. 620 m.
c. 320 m.
d. 520 m.

A

Question. For uniform motion
a. the distance–time graph is a straight line parallel to the time axis.
b. the speed–time graph is a straight line inclined to time axis.
c. the speed–time graph is a straight line parallel to time axis.
d. the acceleration–time graph is a straight parallel to time axis.

C

Question. For a body moving with a constant speed along a circular path, the direction of the velocity is
a. horizontal.
c. along the tangent to the circle.
d. constant.

C

Question. The magnitude of speed and velocity of a body is equal only if the body moves along a
a. straight line.
b. circular path.
c. zigzag path.
d. curved path.

A

Question. A body dropped from the top of a tower reaches the ground in 4 seconds. What is the height of the tower, if g = 10 m s–2?
a. 78 m
b. 70 m
c. 80 m
d. 90 m

C

Question. For a uniformly retarded motion, the velocity–time graph is
a. a curve.
b. a straight line parallel to time axis.
c. a straight line perpendicular to time axis.
d. a straight line inclined to time axis.

D

Question. The slope of a speed–time graph gives
a. velocity.
b. acceleration.
c. displacement.
d. distance travelled.

B

Question. A body falling freely under gravity shows a
a. uniform acceleration.
b. non-uniform acceleration.
c. uniform velocity.
d. variable velocity.

A

Question. The device fitted in an automobile to measure the distance travelled by it is
a. odometer.
b. speedometer.
c. hygrometer.
d. ticker tape timer.

A

Question. If a bus decreases its speed from 80 km/h to 60km/h, then its retardation is
a. 11.1 m s–2
b. 1.11 m s–2
c. –1.11 m s–2
d. 111 m s–2

B

Question. If a body covers equal distances in equal intervals of time in a particular direction, the body is said to have a
a. uniform velocity.
b. non-uniform speed.
c. uniform speed.
d. variable velocity.

A

Question. When a body travels in a straight line and its velocity changes by equal amounts in equal intervals of time, it is said to have
a. uniform velocity.
b. non-uniform acceleration.
c. uniform acceleration.
d. uniform speed.

C

Question. When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, the retardation will be
a. +2 m s–2
b. –2 m s–2
c. –0.5 m s–2
d. + 0.5 m s–2

D

Question. The distance travelled by a body moving in a circular path is
a. πr2
b. 2πr
c. πr
d. 2πr2

B

Question. Which is not the correct equation of motion?
a. s = ut + 1/2 at2
b. v2 – u2 = 2as
c. v = u – at
d. v – u = at

C

Question. A sprinter is running along the circumference of the sports ground with constant speed. Which of the following is changing?
a. Magnitude of acceleration
b. Distance covered
c. Force acting on the sprinter
d. Direction of motion

D

Question. A car moving on a straight road is said to possess
a. rectilinear motion.
b. rotatory motion.
c. rotatory motion.
d. both a and b.

D

Question. A ship is moving at a speed of 56 km/h. One second later it is moving at 58 km/h, then its acceleration is
a. 72 km h–2
b. 720 km h–2
c. 7200 km h–2
d. 7.2 km h–2

C

Question. At the maximum height, a body thrown vertically upwards has
a. velocity not zero but acceleration zero.
b. acceleration not zero but velocity zero.
c. both acceleration and velocity not zero.
d. both acceleration and velocity zero.

D

Question. A body is moving along a circular path of radius r. The displacement of the body when it completes half arevolution is
a. 0
b. 2r
c. πr
d. 2πr