Question

Give an example for each of the following, where the force:

a) changes the direction of a moving object.
b) changes the speed of a moving object.
c) changes the shape and size of an object.
d) stops a moving object.
e) moves a stationary object.

Answer 1

a). The gravitational forces between the Earth and the Sun bends the Earth's motion along a curving path instead of a straight line.

b). The gravitational forces between the Earth and a falling rock make the rock fall faster and faster.

c). The force of a pressurized stream of hot air makes a balloon get rounder and bigger.

d). The gravitational forces between the Earth and a rock tossed straight up make the rock go slower and slower, and eventually stop. (In the next instant, it starts falling, as described in answer-b.))

e). The acoustic and emotional force of your mother's voice 15 minutes before the school-bus arrives causes you to turn over, sit up, and start putting on your socks.

Answer 2

Step-by-step explanation:

• A cricket player hitting the ball from opposite direction.
• A footballer kicking ball with more force.
• Heating of a plastic bottle.
• Applying brake of a car.
• rolling a stopped marble on a table.