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If there were no friction, what would happen to a moving object?

Important Questions on Force and Pressure

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Science>Physics>Force and Pressure>Contact Forces

Force of friction and tension in a string are ___________ in origin

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Science>Physics>Force and Pressure>Contact Forces

A force

\vec{F_{1}}

of magnitude

4 N

acts on an object of mass

1 kg

at origin in a direction

30 °

above the positive

x

- axis. A second force

\vec{F_{2}}

of magnitude

4 N

acts on the same object in the direction of the positive

y

- axis. The magnitude of the acceleration of the object is nearly

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Science>Physics>Force and Pressure>Contact Forces

Electric as well as gravitational affects can be thought to be caused by fields. Which of the following is true for an electrical or gravitational field?

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Science>Physics>Force and Pressure>Contact Forces

When the intermolecular distance decreases due to compressive force, there is

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Science>Physics>Force and Pressure>Contact Forces

Two equal forces are acting at a point, making an angle of $60 °$ with each other. If their resultant force is equal to $40 \sqrt{3} N,$ the magnitude of each force is

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Science>Physics>Force and Pressure>Contact Forces

Which of the following statement is correct?

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Science>Physics>Force and Pressure>Contact Forces

Which one of the following is not a contact force?

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Science>Physics>Force and Pressure>Contact Forces

Three forces of magnitude $6 N, 6 N$ and $\sqrt{72} N$ act at a cormer of a cube along three edges of a cube, as shown in the figure. The resultant of the three forces is

Question Image

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Science>Physics>Force and Pressure>Contact Forces

Consider the following statements about the four fundamental forces in nature.
(i) The strong nuclear force binds protons and neutrons in a nucleus.
(ii) The strong nuclear force is about

10^{3}

times the electromagnetic force in strength.
(iii) The weak nuclear force is the weakest of all the four fundamental forces.
(iv) The range of the weak nuclear is about

10^{- 16} m

The correct statement(s) is (are)

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Science>Physics>Force and Pressure>Contact Forces

Which of the following is not an example of muscular force?

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Science>Physics>Force and Pressure>Contact Forces

In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case.
Squeezing a piece of lemon between the fingers to extract its juice.

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Science>Physics>Force and Pressure>Contact Forces

What is the muscular force? Give one example of muscular force.

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Science>Physics>Force and Pressure>Contact Forces

Define frictional force (or friction).

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Science>Physics>Force and Pressure>Contact Forces

In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case.
Taking out paste from a toothpaste tube.

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Science>Physics>Force and Pressure>Contact Forces

Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion

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Science>Physics>Force and Pressure>Contact Forces

List any two advantages and two disadvantages of friction.

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Science>Physics>Force and Pressure>Contact Forces

Which force do the animals apply while moving, chewing and doing other activities

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Science>Physics>Force and Pressure>Contact Forces

It is difficult to walk on a wet floor. Why?

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Science>Physics>Force and Pressure>Contact Forces

Why is heat produced when we rub our hands together?