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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.
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.
State whether the following statement is true or false :
Unbalanced forces acting on a body change its shape.
State whether force is a scalar or a vector quantity?
Fill in the following blank with suitable word:
When a running car stops suddenly, the passengers are jerked …………………..
Fill in the following blank with suitable word :
When a stationary car starts suddenly, the passengers are jerked …………………..
Which of the two, balanced forces or unbalanced forces, can change the shape of an object ? Give an example to illustrate your answer.
There are two types of forces X and Y. The forces belonging to type X can produce motion in a stationary object but cannot change the shape of the object. On the other hand, forces belonging to type Y cannot produce motion in a stationary object but can change the object. What is the general name of the forces as (a) X, and (b) Y?
Give one example where a force stops a moving body .
When a toothpaste tube is squeezed, its shape changes. The force responsible for this is an example of :
When we talk of a force acting on a body, it usually means :
