Unseen Passage

For Class 4 to Class 12

Motion MCQ Class 9 Science

Please refer to Chapter 8 Motion MCQ Class 9 Science with answers below. These multiple-choice questions have been prepared based on the latest NCERT book for Class 9 Science. Students should refer to MCQ Questions for Class 9 Science with Answers to score more marks in Grade 9 Science exams. Students should read the chapter Motion and then attempt the following objective questions.

MCQ Questions Class 9 Science Chapter 8 Motion

The Motion MCQ Class 9 Science provided below covers all important topics given in this chapter. These MCQs will help you to properly prepare for exams.

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

B

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

B

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

B

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

B

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. 2πr/t
d. 2πr × t

C

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

A

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. 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. 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. 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. 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–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. 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.