Question

MOTION
1. An object has moved through a distance. Can it have zero displacement? If yes, support your answer with
an example.
2. A farmer moves along the boundary of a square field of side 10 min 40 s. What will be the magnitude of
displacement of the farmer at the end of 2 minutes20 seconds?
3. Which of the following is true for displacement?
(a) It cannot be zero.
(b) Its magnitude is greater than the distance travelled by the object.
4. An object travels 16 m in 4 sand then another 16 m in 2 s. What is the average speed of the object?
5. Distinguish between speed and velocity.
6. Under what condition(s) is the magnitude of average velocity of an object equal to its average speed?
7. What does the odometer of an automobile measure?
8. What does the path of an object look like when it is in uniform motion?
9. During an experiment, a signal from a spaceship reached the ground station in five minutes. What was the
distance of the spaceship from the ground station? The signal travels at the speed of light that is, 3 X 10Ⓡm/s.
10. The odometer of a car reads2000 km at the start of a trip and2400 km at the end of the trip. If thetrip took
8 h, calculate the average speed of the car in km/h and m/s
11. Usha swims in a 90 m long pool. She covers 180 m in one minute by swimming from one end to the other
and back along the same straight path. Find the average speed and average velocity of Usha.
12. When will you say a body is in
(i) uniform acceleration?
(ii) non uniform acceleration?
13. A bus decreases its speed from 80 km/h to 60 km/h in 5 s. Find the acceleration of the bus.
14. A train starting from a railway station and moving with uniform acceleration attains a speed40 km/h in 1
minutes. Find its acceleration.​

Answer 1

Explanation:

6. if total distance is equal to the net displacement of particle

eg. body moves along a straight line path in fixed direction

8. straight line

12.1 if object velocity is increasing at a constant rate

12.2 if object velocity is increasing unequally in equal interval of time jo

Answer 2

$\huge\mathcal\color{teal}{Answer :- }$

An object has moved through a distance. Can it have zero displacement? If yes, support your answer with an example.

Yes, an object moving a certain distance can have zero total displacement. Displacement refers to the shortest distance between the initial and the final positions of the object. Even if an object moves through a considerable distance, if it eventually comes back to its initial position, the corresponding displacement of the object would be zero.