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प्रश्न
State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?
उत्तर
The magnitude of non-contact force on two bodies depends on the distance of separation between them.
The force decreases as the distance of separation increases.
The force is inversely proportional to the square of the distance of separation.
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संबंधित प्रश्न
State the effects of a force applied on
- A non-rigid, and
- A rigid body.
How does the effect of the force differ in the two cases?
'More the mass, the more difficult it is to move the body from rest'. Explain this statement by giving an example.
A car initially at rest, picks up a velocity of 72 kmh−1 in 20 seconds. If the mass of the car is 1000 kg, find
- Force developed by its engine
- Distance covered by the car.
A golfer hits a ball at rest, such that the contact between the ball and golf stick is for 0.1 s. If the golf ball covers a linear distance of 400 m in 2 s, find the magnitude of force applied. Mass of golf ball is 50 g.
Explain the following:
Why do we jerk wet clothes before spreading them on a line?
Gravitational force is a ______ force.
Complete the analogy.
Kicking a ball: Contact force:: Falling of leaf: ______?
In the circuit shown in figure, when the key is closed, the compass needle placed in the match box deflects. Name the force which cases this deflection.
Does the force of gravitation exist between two astronauts in space?
Figure shows a car sticking to an electromagnet. Name the forces acting on the car. Which one of them is larger?
