Advertisements
Advertisements
प्रश्न
A golfer hits a ball at rest, such that the contact between the ball and golf stick is for 0.1 s. If the golf ball covers a linear distance of 400 m in 2 s, find the magnitude of force applied. Mass of golf ball is 50 g.
उत्तर
Distance covered by ball = 400 m
Time taken = 2 s
Distance 400
∴ Uniform velocity of the ball = `"Distance"/"Time"=400/2` = 200 ms−1
Now initial velocity of the ball = u = 0
Time for which force acts on the ball = t = 0.1 s
Final velocity of the ball after the force stops acting on it
= v = 200 ms−1
Using, v = ut + at
We have, 200 = 0 + a (0.1)
a = `200/0.1` = 2000 ms−2
Mass of the ball = m = 50 g = 0.05 kg
Force acting on the ball = F = ma
F = 0.05 × 2000
F = 100N
APPEARS IN
संबंधित प्रश्न
A charged body ______ an uncharged body towards it.
The north pole of a magnet ______ the north pole of another magnet.
Make a match
| A group | B group |
| 1. Fluid | a. Higher pressure |
| 2. Blunt knife | b. Atmospheric pressure |
| 3. sharp needle | c. Specific gravity |
| 4. Relative density | d. Lower pressure |
| 5. Hecto pascal | e. Same pressure in all directions |
Which of the following is a contact force:
Name the S.I. unit of force and define it .
Complete the analogy.
Kicking a ball: Contact force:: Falling of leaf: ______?
During dry weather, clothes made of synthetic fibre often stick to the skin. Which type of force is responsible for this phenomenon?
Figure shows a man with a parachute. Name the force which is responsible for his downward motion. Will he come down with the same speed without the parachute?
Fruits detached from a tree fall down due to the force of gravity. We. know, that a force arises due to the interaction between two objects. Name the objects interacting in this case.
A man is pushing a cart down a slope. Suddenly the cart starts moving faster and he wants to sloyy it down. What should he do?
