हिंदी

A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because ______.

Advertisements
Advertisements

प्रश्न

A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because ______.

विकल्प

  • the batsman did not hit the ball hard enough.

  • velocity is proportional to the force exerted on the ball.

  • there is a force on the ball opposing the motion.

  • there is no unbalanced force on the ball, so the ball would want to come to rest.

MCQ
रिक्त स्थान भरें
Advertisements

उत्तर

A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because there is a force on the ball opposing the motion.

Explanation:

  • The cricket ball comes to a halt after a short distance because a force opposes the motion.
  • This force is the result of both air resistance and friction between the ball and the ground.
shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Force and Laws of Motion - Exercises [पृष्ठ ९७]

APPEARS IN

एनसीईआरटी Science [English] Class 9
अध्याय 8 Force and Laws of Motion
Exercises | Q 4. | पृष्ठ ९७

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

In an imaginary atmosphere, the air exerts a small force F on any particle in the direction of the particle's motion. A particle of mass m projected upward takes time t1 in reaching the maximum height and t2 in the return journey to the original point. Then.


A particle stays at rest as seen in a frame. We can conclude that
(a) the frame is inertial
(b) resultant force on the particle is zero
(c) the frame may be inertial but the resultant force on the particle is zero
(d) the frame may be non-inertial but there is a non-zero resultant force


A block of mass 2 kg placed on a long frictionless horizontal table is pulled horizontally by a constant force F. It is found to move 10 m in the first seconds. Find the magnitude of F.


When a train starts, the head of a standing passenger seems to be pushed backward. Analyse the situation from the ground frame. Does it really go backward? Coming back to the train frame, how do you explain the backward movement of the head on the basis of Newton's laws?


How does Newton's second law of motion differ from the first law of motion?


The masses of 10 kg and 20 kg, respectively, are connected by massless spring as shown in the figure. A force of 200 N acts on the 20 kg mass. At the instant shown, the 10 kg mass has acceleration of 12 m/s2. What is the acceleration of 20 kg mass?

(g = 10 m/s2)

 


A balloon has mass of 10 g in air. The air escapes from the balloon at a uniform rate with velocity 4.5 cm/s. If the balloon shrinks in 5 s completely. Then, the average force acting on that balloon will be (in dyne).


Match the following.

Column I Column II
a. Newton’s I law propulsion of a rocket
b. Newton’s II law Stable equilibrium of the body
c. Newton’s III law Law of force
d. Law of conservation of Linear momentum Flying nature of bird

What does inertia measure in an object?


An insect is at the bottom of a hemispherical ditch of radius 1 m. It crawls up the ditch but starts slipping after it is at height h from the bottom. If the coefficient of friction between the ground and the insect is 0.75, then h is ______. (g = 10 ms−2)


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×