Advertisements
Advertisements
प्रश्न
While catching a cricket ball the fielder lowers his hands backwards. Why?
उत्तर
- When the fielder lowers his hands backward, he increases the value of time of the collision and so retardation is decreased.
- Hence retarding force becomes lesser than before and the palm of the fielder is not hurt very much.
APPEARS IN
संबंधित प्रश्न
A stone of 1 kg is thrown with a velocity of 20 m s−1 across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?
Fill in the following blanks with suitable words :
Forces in a Newton’s third law pair have equal _____________ but act in opposite _____________.
If a man jumps out from a boat, the boat moves backwards. Why ?
Why is it difficult to walk on a slippery road ?
Explain why, a runner presses the ground with his feet before he starts his run.
Draw a diagram to show how a rocket engine provides a force to move the rocket upwards. Label the diagram appropriately.
Name the law involved in the following situation :
when person A standing on roller skates pushes another person B (also standing on roller skates) and makes him move to the right side, then the person A himself gets moved to the left side by an equal distance.
State Newton’s third law of motion and give two examples to illustrate the law.
According to the third law of motion, action and reaction :
Consider a frame that is made up of two thin massless rods AB and AC as shown in the figure. A vertical force `vec"P"` of magnitude 100 N is applied at point A of the frame.
Suppose the force is `vec"P"` resolved parallel to the arms AB and AC of the frame.
The magnitude of the resolved component along the arm AC is xN.
The value of x, to the nearest integer, is ______.
[Given: sin(35°) = 0.573, cos(35°) = 0.819, sin(110°) = 0.939, cos(110°) = –0.342]