What is the reason for the wearing out of the tyre of a vehicle?
a) Gravitational force
b) Magnetic force
c) Frictional force
d) Electrostatic force
Answer: c) Frictional force
What is the effect of applying a force in a direction opposite to the motion of an object?
a) The speed of the object increases.
b) The speed of the object remains the same.
c) The speed of the object decreases.
d) The direction of the object’s motion changes.
Answer: c) The speed of the object decreases.
Which type of motion is exhibited by the second hand of a clock?
a) Straight-line motion
b) Circular motion
c) Rotational motion
d) Periodic motion
Answer: d) Periodic motion
What is the main purpose of a brake in a vehicle?
a) To increase the speed of the vehicle
b) To change the direction of the vehicle
c) To decrease the speed of the vehicle
d) To apply a force in the direction of motion
Answer: c) To decrease the speed of the vehicle
What is the effect of the force of gravity on an object?
a) It causes the object to move upward.
b) It causes the object to move sideways.
c) It causes the object to move downward.
d) It has no effect on the object’s motion.
Answer: c) It causes the object to move downward.
What is the principle behind the working of a barometer?
a) Atmospheric pressure
b) Pressure of liquids
c) Pressure of gases
d) Pressure of solids
Answer: a) Atmospheric pressure
What is the purpose of a tyre pressure gauge?
a) To measure the atmospheric pressure
b) To measure the pressure inside the tyre
c) To measure the pressure of the liquid in the tyre
d) To measure the frictional force on the tyre
Answer: b) To measure the pressure inside the tyre
What is the reason for blood oozing out of the nose at high altitudes?
a) Decreased atmospheric pressure
b) Increased atmospheric pressure
c) Decreased blood pressure
d) Increased blood pressure
Answer: a) Decreased atmospheric pressure
What is the principle behind the working of a U-tube manometer?
a) Atmospheric pressure
b) Pressure of liquids
c) Pressure of gases
d) Pressure of solids
Answer: b) Pressure of liquids
What is the effect of increasing the surface area of an object in contact with a liquid?
a) The pressure on the object decreases.
b) The pressure on the object increases.
c) The pressure on the object remains the same.
d) The pressure on the object cannot be determined.
Answer: a) The pressure on the object decreases.
What is the effect of increasing the area over which a force is applied?
a) The pressure increases.
b) The pressure decreases.
c) The pressure remains the same.
d) The pressure cannot be determined.
Answer: b) The pressure decreases.
What is the reason for the difference in the distance travelled by a ball on a smooth surface compared to a rough surface?
a) Gravitational force
b) Magnetic force
c) Frictional force
d) Electrostatic force
Answer: c) Frictional force
What is the reason for the compression of an airtight container when the water inside it boils and then cools down?
a) Increased atmospheric pressure
b) Decreased atmospheric pressure
c) Increased pressure of water vapor
d) Decreased pressure of water vapor
Answer: d) Decreased pressure of water vapor
