Question 1 :
A train starting from rest attains a velocity of 72 km $h^{–1}$ in 5 minutes. Assuming that the acceleration is uniform, What is the distance travelled by the train for attaining this velocity?
Question 2 :
When will you say a body is in uniform acceleration ?
Question 3 :
Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m back to point C in another 1 minute. What is Joseph's average speed from A to C?
Question 4 :
Is magnitude of displacement greater than the distance travelled by the object?
Question 5 :
State true or false: The magnitude of displacement is greater that the distance travelled by the object.
Question 6 :
The average velocity of an object is obtained by which of these formulas ?
Question 7 :
A bus decreases its speed from 80 km/h to 60 km/h in 5 s. What is the acceleration of the bus?
Question 8 :
The displacement of a moving object in a given interval of time is zero. Would the distance travelled by the object also be zero?
Question 9 :
If the moon attracts the earth, Does the earth not move towards the moon?
Question 11 :
The weight of any person on the moon is about $\frac{1}{6}$ times that on the earth. He can lift a mass of 15 kg on the earth. What will be the maximum mass, which can be lifted by the same force applied by the person on the moon?
Question 12 :
What is the force of gravitation between the earth and the Sun, given that the mass of the$ earth = 6\times10^{24}$ kg and of the $Sun = 2\times10^{30}$ kg. The average distance between the two is $1.5\times10^{11}$ m.
Question 13 :
Why does a block of plastic released under water come up to the surface of water?
Question 14 :
A ball thrown up vertically returns to the thrower after 6 s.What is the maximum height it reaches?
Question 16 :
A block of wood is kept on a tabletop. The mass of wooden block is 5 kg and its dimensions are $40 cm \times 20 cm \times 10 cm$. What is the pressure exerted by the wooden block on the table top if it is made to lie on the table top with its sides of dimensions $20 cm \times 10 cm$?
Question 17 :
Gravitational force on the surface of the moon is only $\frac{1}{6}$ as strong as gravitational force on the earth. What is the weight in newtons of a 10 kg object on the moon and on the earth? (Consider $ g=9.8 \ m\ s^{-2}$ )
Question 18 :
A ball is thrown vertically upwards with a velocity of 49 m/s.What is the total time it takes to return to the surface of the earth?
Question 20 :
A ball is thrown vertically upwards with a velocity of 49m/s. Calculate the maximum height to which it rises.