Physics
State the effect produced by a force in the following cases :
(a) The sling of a rubber catapult is stretched
(b) A man pushes a heavy cart
(c) A player uses his stick to deflect the ball
(d) A cyclist applies brakes
(e) A spring is compressed.
Answer
(a) The sling of a rubber catapult is stretched → changes the shape of the sling and increases it's length.
(b) A man pushes a heavy cart → changes the state of motion so cart starts moving or speeds up.
(c) A player uses his stick to deflect the ball → changes direction of motion of the ball.
(d) A cyclist applies brakes → the speed of the cycle slows down and may come to rest.
(e) A spring is compressed → shape changes and length of the spring decreases.
Related Questions
What effect can a force produce on a body which is not allowed to move?
Give one example each to indicate that the application of a force
(a) produces motion
(b) stops motion
(c) slows down motion
(d) changes the direction of motion
(e) deforms a body.
Name the two kinds of forces in nature.
Name the type of force which acts in the following cases :
(a) A coolie lifts a luggage
(b) A bicycle comes to rest slowly when the cyclist stops pedalling
(c) A stone falls from a roof
(d) A comb rubbed with silk attracts bits of paper
(e) A string hangs with a load
(f) A horse moves a cart
(g) A magnet attracts an iron pin
(h) A boy opens a door
(i) An apple falls from a tree
(j) A man rows a boat