ARMY
PUBLIC SCHOOL, GOLCONDA
Class 9 – Physics -
Ch 8 – Motion
(WORKSHEET)
Fill in the blanks
1. If the position of an object does not change with time, it is said to be at _____.
2. An object is said to be at ________ (rest/motion), if it changes its position with respect to its surroundings in a given time
3. Distance is the length of ______(actual/shortest) path traveled by a body in a given time.
4. Displacement is the ______ (actual/shortest) path covered by a moving object from the initial point of reference in a specified direction.
5. Distance is a _______ (scalar/vector) physical quantity while displacement is a _______ (scalar/vector) physical quantity.
MCQs
1. The SI unit of displacement is-
(a) m
(b) km
(c) cm
(d) am
(a) m
(b) km
(c) cm
(d) am
2. If a body travelled to some path then its
distance-
(a) can be positive
(b) can be zero
(c) can be negative
(d) all are true.
(a) can be positive
(b) can be zero
(c) can be negative
(d) all are true.
3. If a body travelled to some path then its
displacement -
(a) can be positive
(b) can be zero
(c) can be negative
(d) all are true.
(a) can be positive
(b) can be zero
(c) can be negative
(d) all are true.
4. Distance is always ≥ displacement -
(a) true
(b) false
(c) both (a) and (b)
(d) neither (a) nor (b).
(a) true
(b) false
(c) both (a) and (b)
(d) neither (a) nor (b).
5. In the given figure, object starts its motion
at point A,GO TO B-C-D and again came back to A. find DISTANCE AND
DISPLACEMENT at point A.
(a) 0 / 16
(b) 16 / 0
(c) can’t say
(d) 8 / 8
Q & A’s
1. Differentiate between
“distance” and “displacement”.
2. If the displacement of a body is zero, is the
distance by it is also zero? Comment.
3. Is the magnitude of the displacement and
distance of an object can be equal? Justify.
4. Show that displacement of a body is either
smaller or equal to the distance of the body.
5. Chancy drives her scooter 7 kilometers
north. She stops for lunch and then drives 5 kilometers east. What
distance did she cover? What was her displacement?
Solve the following
1. In figure-
John walks from the
point A to B to C. What does the distance he travels? What is the
displacement?
2. Bessie the fox and
Sally the rabbit both traveled from point “A” to point “B.” Sally traveled in a
straight line and Bessie did not.
A. What distance does
Bessie the fox travel?
B. What distance does
Sally the rabbit travel?
C. What is Bessie the
fox’s displacement?
D. What is Sally the
rabbit’s displacement?
3.
The track is 100 meter
around.
a.) If the car travels
once around the racetrack, what distance does it travel?
b.) If the car travels
twice around the racetrack, what distance does it travel?
c.) If the car travels
once around the racetrack, what is its displacement?
4. An athlete completes one round of a circular path of
diameter 200 m in 40 seconds. What will be the distance covered and
displacement at the end of 2 min 20 seconds?
5. What are the distance and the displacement of the race car
drivers in completing path of length 500 m?
7. A particle moves along a circle of radius ‘R’. it starts
from A and moves in antilock direction. Calculate the distance travelled by
particle
(a) From A to B
(b) From A to C
(c) From A to
D
(d) for complete 2 rounds.
8. A
car moves 100 m due east and then 25 m due west, (a) What is the distance
Covered by the car?
(b) What is its displacement?
9. What is the displacement of the cross-country team if they begin
at the school, run 10 miles and finish back at the school?
10. Look at the picture given below. An object moves from point A
through B, C, D, E. and stops at point F.
a) Find final
displacement
b)Find distance taken
from point A to D.
Mam we have to do in class notebook...
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