A toy car released with the same initial speed will travel
farthest on
(a) muddy surface (c) cemented surface
(b) polished marble surface (d) brick surface
To sharpen the blade of a knife by rubbing it against a surface,
which of the following will be most suitable?
(a) stone (c) wooden block
(b) plastic block (d) glass block
Whenever the surfaces in contact tend to move or move with
respect to each other, the force of friction comes into play
(a) only if the objects are solid.
(b) only if one of the two objects is liquid.
(c) only if one of the two objects is gaseous.
(d) irrespective of whether the objects are solid, liquid or gaseous
Two women are of the same weight. One wears sandals with
pointed heels while the other wears sandals with flat soles. Which
one would feel more comfortable while walking on a sandy beach?
Give reasons for your answer.
An archer shoots an arrow in the air horizontally. However, after
moving some distance, the arrow falls to the ground. Name the
initial force that sets the arrow in motion. Explain why the arrow
ultimately falls down.
A man is pushing a cart down a slope. Suddenly the cart starts
moving faster and he wants to slow it down. What should he do?
Fruits detached from a tree fall down due to force of gravity. We
know that a force arises due to interaction between two objects.
Name the objects interacting in this case.
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