(wy vusurveis a ustance of 120 km with a speed 01 40 KIMII NU TELUPIS WII d specu U
30 km/h. Calculate the average speed for the entire journey.
12. Define uniform and non-uniform motion. Write one example for each.
13. What does the odometer of an automobile measure? Which of the following is moving faster?
Justify your answer.
(i) A scooter moving with a speed of 300 m per I minute.
(ii) A car moving with a speed of 36 km per hour.
14. A car travels from stop A to stop B with a speed of 30 km/h and then returns back to A with
a speed of 50 km/h. Find
(i) displacement of the car.
(ii) distance travelled by the car.
(iii) average speed of the car.
15. Velocity-time graph for the motion of an object in a straight path is a straight line parallel to
the time axis.
(a) Identify the nature of motion of the body.
(b) Find the acceleration of the body.
(c) Draw the shape of distance-time graph for this type of motion.
16. Draw the shape of the distance-time graph for uniform and non-uniform motion of object. A
bus of starting from rest moves with uniform acceleration of 0.1 ms for 2 minutes. Find
(a) the speed acquired.
(b) the distance travelled.
17. A bus accelerates uniformly from 54 km/h to 72 km/h in 10 seconds Calculate
(i) acceleration in m/s?
(ii) distance covered by the bus in metres during this interval.
18. A car moves with a speed of 30 km/h-' for half an hour, 25 km/h-' for one hour and 40 km/h
for two hours. Calculate the average speed of the car.
19. Derive the equation for velocity-time relation (v = u + at) by graphical method.
20. A car is travelling at 20 km/h, it speeds upto 60 km/h in 6 seconds. What is its acceleration?
21. A car accelerates from 6 ms 16 ms in 10 sec. Calculate
(a) the acceleration and
(b) the distance covered by the car in that time.
22. A circular track has a circumference of 3140 m with AB as one of its diameter. A scooterist
moves from A to B alone the circular path with a uniform speed of 10 m/s. Find
(a) distance covered by the scooterist,
(b) displacement of the scooterist, and
(c) time taken by the scooterist in reaching from A to B.
Answers
Answered by
3
Answer:
eghsge
Explanation:
ege7uevxhegx6egey7dvegxydveh
Answered by
10
Answer:
20.
U = 20km/h
V = 60km/h
T = 6 sec
a = V-U/ T
= 60-20/6
= 40/6
a = 6.66
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