Fill in the blanks. (4-marks)
(1)The largest unit of length is the _______.
(2)The weight of 60 kg mass on the moon is _____ N.
(3)If a ball is thrown upward with a velocity of 20 ms-1 ,it will be caught again after ____ s.
(4)Mass is the _______ of matter in a body.
2.Are the following statements True (or) False? (4-marks)
(1)The density of a liquid is defined as the ratio of its mass to volume.
(2)The value of velocity is zero at the highest point.
(3)Volume is a basic quantity.
(4)The time taken to reach the highest point is the same as the time taken to reach the ground
from the highest point. 3. Define acceleration.
A car is travelling with a constant velocity of 6 ms -1 .The driver applies the breaks as he
see a cow wich is at a distance of 24 m from the car.Find the acceleration of the car if it stops
just in front of the cow. (4-marks)
4.In order to weight a boy in the laboratory ,a uniform plank