Question

Q1. a) “A ball is thrown vertically upwards and returns back to the hands
of the thrower.” Show the above mentioned case in a single vel-time
graph.
b) State two conditions under which the acceleration of an object can be
zero.
Q2. a) Identified the laws involved and state it also:

(i)Cricketers used to lower down his hand to catch a cricket
ball.
(ii)Dust particles come out when we beat the carpet with a
stick.
(iii) The gun recoils back when fired.
b) Two objects A and B having masses 1kg and 1.5 kg
respectively are moving along the same straight line in opposite
directions with velocities 10m/s and 5m/s respectively. They collide
and stick to each other. What is the velocity of the combination?
Q3.a) Define acceleration due to gravity.
b) On what factors the value of ‘g’ depends.
c) Name the places where it can be zero.
d) Obtain the relation between acceleration due to gravity (g) and
Universal gravitational constant (G).

Answer 1

Explanation:

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