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प्रश्न
Why does it happen?
If a stationary bus suddenly speeds up, passengers are thrown in the backward direction.
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उत्तर
If a stationary bus suddenly speeds up, passengers are thrown in the backward direction. This is because initially, the whole body of a passenger inside the bus was in the state of rest. But, when the bus suddenly starts or speeds up, the lower half of the passenger's body comes into motion in the forward direction, but the upper half still remains at rest due to the inertia of rest. Hence, the passengers are thrown backwards when a stationary bus suddenly speeds up.
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संबंधित प्रश्न
An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity? If yes, state the conditions that must be placed on the magnitude and direction of the velocity. If no, provide a reason.
What is the usual name of the forces which cannot produce motion in a body but only change its shape ?
State whether the following statement is true or false :
Unbalanced forces acting on a body change its shape.
Explain why, it is dangerous to jump out of a moving bus.
Give one example where a force changes the speed of a moving body.
Give one example where a force changes the direction of a moving body.
What do you understand by the terms “balanced forces” and “unbalanced forces” ? Explain with examples.
What type of forces – balanced or unbalanced – act on a rubber ball when we press it between our hands ? What effect is produced in the ball ?
What is the relationship between force and acceleration ?
Which of the following effect cannot be produced by an unbalanced force acting on a body?
