- Define gravity.
Answer. Gravity is the universal force of attraction acting between objects.
- What is an inclined plane?
Answer. Normally a tilted surface is known as an inclined plane. It is a flat supporting surface tilted at an angle, with one end higher than the other. The inclined plane is mainly used as a tool for lowering or raising a load.
- Why is the glass plate fixed at the top of the inclined plane?
Answer. To make the surface smooth, the glass plate is fixed at the top of the inclined plane.
- List the applications of an inclined plane.
Answer. A ladder and the ramp of a house are the best examples of an inclined plane used in everyday life. An inclined plane is mainly used in loading and unloading goods on trucks, vehicles or ships.
- How is the normal reaction on the inclined plane represented?
Answer. The normal reaction on the inclined plane is represented as mgcosθ.
- Explain the relationship between downward force and angle of inclination of the plane?
Answer. The relationship between downward force and angle of inclination of the plane W=mg sin θ
- Who discovered the concept of gravity?
Answer. The concept of gravity was discovered by Sir Isaac Newton.
- What is the value of g on the Earth?
Answer. The value of g on the Earth is 9.8 ms^2.
- State true or false: In an inclined plane, objects accelerate down due to an unbalanced force.
Answer. TRUE.
- What is meant by downhill motion?
Answer. The total force on the load is toward the downhill side, so the frictional force is directed up the plane.
- What is the formula to find the gravitational force?
Answer. The gravitational force is given by the formula:
- What is the value of G?
Answer. The value of ‘G’ is 6.674*10^−11 Nm^2 kg^-2.
- The tides in the ocean are caused due to which celestial object?
Answer. The tides in the ocean are caused due to the Moon. The force of attraction between the earth and the moon causes tides in the ocean.
- Gases in the sun are held together by which force?
Answer. The gases in the sun are held together by the gravitational force.
- State true or false: Gravity can bend light.
Answer. True. Gravity has the ability to bend the light.
- Which is the weakest of the fundamental forces?
Answer. Gravity is the weakest of the fundamental forces.
Also Read:
- To find the downward force, along an inclined plane, acting on a roller due to the gravitational pull of the earth and study its relationship with the angle of inclination (θ) by plotting graph between force and sin θ
- Gravitational force
- Chapter Wise Physics Class 11 MCQs
- Physics Class 11 Practicals list
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