Advertisements
Advertisements
प्रश्न
Explain why, it is dangerous to jump out of a moving bus.
Advertisements
उत्तर
It is dangerous to jump out of a moving bus because the person who jumps is moving with the same speed as that of the bus and would tend to remain in motion (due to inertia) even after falling to the ground; thus, he may get hurt due to the resistance of the stationary ground.
APPEARS IN
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.
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.
A car is moving on a level road. If the driver turns off the engine of the car, the car’s speed decreases gradually and ultimately it comes to a stop. A student says that two forces act on the car which bring it to a stop. What could these forces be ? Which of these two forces contributes more to slow down and stop the car ?
What is the relationship between force and acceleration ?
A 1000 kg vehicle moving with a speed of 20 m/s is brought to rest in a distance of 50 metres :
(i) Find the acceleration.
(ii) Calculate the unbalanced force acting on the vehicle.
Give one example where a force stops a moving body .
A fielder pulls his hands backwards after catching the cricket ball. This enables the fielder to :
The SI unit of force is ______.
