Advertisements
Advertisements
Question
Why does it happen?
If a stationary bus suddenly speeds up, passengers are thrown in the backward direction.
Solution
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.
RELATED QUESTIONS
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.
Fill in the following blanks with suitable word :
If there were no unbalanced force of……………….. and no…………………. resistance, a moving bicycle would go on moving for ever.
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 shape (and size) of a body.
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?
What is the relationship between force and acceleration ?
When a toothpaste tube is squeezed, its shape changes. The force responsible for this is an example of :
Which of the following effect cannot be produced by an unbalanced force acting on a body?
A fielder pulls his hands backwards after catching the cricket ball. This enables the fielder to :
