Question

1.
Name the five effects of force.
2.
What is frictional force? Give two examples of frictional force.
3. Define pressure. What is the Sl unit of pressure?
Science quiz:
Name the instrument used to measure the atmospheric pressure.
What are the two parameters that define pressure?
3. Name one force that can act from a distance.
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Answer 1

Answer:

1. Five effects of force are:-

• force can move a stationary object.
• force can stop a moving body
• force can change the speed of moving body
• force can change the direction of a moving body
• force can change the shape of a moving obect

2. Frictional force:-

• Frictional force refers to the force generated when two comes in contact and slide against each other.

Two examples of frictional force are:-

• writing something ( when we are writing something with pen or pencil .It comes in contact with page and slide againt each other, thus frictional force act there)
• walking (when we are walking our foot comes in contact with surface of the earth and slide against each other)

3. Pressure:-

Pressure is the force acted perdenicularly

on a surface of an object per unit area.

• SI unit of force is Pa or Nm-²

SCIENCE QUIZ:

• Barometer
• Mass and Volume

4. Gravitational Force

Explanation:

HOPE IT HELPS!!

Answer 2

Answer:

1.A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate.

2.Friction is a force that resists motion between two bodies in contact. e.g. The force of friction slows the ball down when it rubs against another object. You can observe friction when you roll a football on the ground.

3.Thrust is the force acting normally on a surface.Its S.I unit is pascal.

science quiz.

1.barometer.

2.mass and volume are the two parameters.

3.magnetic force.

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