GEOLOGY

EARTH SCIENCE

MAGNETISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of these will exert the greatest force as it collides with a cemented wall?
A
a push cart moving very fast
B
a school bus moving very slowly
C
a passenger bus moving very fast
D
a car which almost about to stop
Explanation: 

Detailed explanation-1: -Answer and Explanation: When a car crashes into a wall, the wall and the car will exert equal and opposite forces on each other. These forces are known as action and reaction forces, and they are described by Newton’s third law of motion.

Detailed explanation-2: -Answer and Explanation: (a) The amount of force exerted on the bus by the fly is the same as the amount of force exerted on the fly by the bus. Thus, the impact force is the same for both.

Detailed explanation-3: -According to Newton’s third law, when a small sports car collides with a massive truck, both vehicles will experience the same amount of impact force. Since force is the product of mass and acceleration, the small sports car will have a larger acceleration while the massive truck will have a smaller acceleration.

Detailed explanation-4: -By hitting the haystack instead of the wall, you extend the contact time-the time during which your momentum is brought to zero. A longer contact time reduces the force and decreases the resulting deceleration. For example, if the time is extended 100 times, the force of impact is reduced 100 times.

There is 1 question to complete.