Physics Motion in One Dimension Numerical2a
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Numericals
Q1 The speed of a car is 72km h-1 . Express it in ms-1 .
Q2 Express 15 ms-1 in km h-1
Q3 Express each of the following in ms-1 :
(a) 1km h-1
(b) 18 km min-1
Q4 Arrange the following speeds in increasing order:
10 ms-1 , 1km min-1 , 18 km h-1
Q5 A train takes 3h to travel from Agra to Delhi with a uniform speed of 65 km h-1 . Find the distance between the two cities.
Q6 A car travels first 30km with a uniform speed of 60km h-1 and then next 30km with a uniform speed of 40 km h-1 . Calculate:
(i) the total time of journey, (ii) the average speed of the car.
Q7 A train takes 2h to reach station B from station A, and then 3 h to return from station B to station A. The distance between the two stations is 200km. Find:
(i) The average speed
(ii) The average velocity of the train
Q8 A car moving on a straight path covers a distance of 1km due east in 100s. What is (i) the speed and (ii) the velocity of car?
Q9 A body starts from rest and acquires a velocity 10 ms-1 in 2s. Find its acceleration.
Q10 A car starting from rest acquires a velocity 180 ms-1 in 0.05 h. Find the acceleration.
Q11 A body is moving vertically upwards. Its velocity changes at a constant rate from 50 ms-1 to 20 ms-1 in 3s. What is its acceleration?
Q12 A toy car initially moving with a uniform velocity of 18km h-1 comes to a stop in 2s. Find the retardation of the car in S.I units.
Q13 A car accelerates at a rate of 5 ms-2 . Find the increase in its velocity in 2s.
Q14 A car is moving with a velocity 20m/s. The brakes are applied to retard it at a rate of 2m/s2 . What will be the velocity after 5s of applying the brakes?
Q15 A bicycle initially moving with a velocity 5m/s accelerates for 5s at a rate of 2 m/s2 . What will be its final velocity?
Q16 A car is moving in a straight line with speed 18km h-1 . It is stopped in 5s by applying the brakes.
Find:
(i) the speed of car in m/s, (ii) the retardation and (iii) the speed of car after 2s of applying the brakes
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