मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

A Smooth Wedge a is Fitted in a Chamber Hanging from a Fixed Ceiling Near the Earth'S Surface. a Block B Placed at the Top of the Wedge Takes Time T to Slide Down the L

Advertisements
Advertisements

प्रश्न

A smooth wedge A is fitted in a chamber hanging from a fixed ceiling near the earth's surface. A block B placed at the top of the wedge takes time T to slide down the length of the wedge. If the block is placed at the top of the wedge and the cable supporting the chamber is broken at the same instant, the block will.

पर्याय

  •  take a time longer than T to slide down the wedge

  • take a time shorter than T to slide down the wedge

  • remain at the top of the wedge

  • jump off the wedge

MCQ
Advertisements

उत्तर

remain at the top of the wedge

Downward gravitational force will be balanced by the upward pseudo force (because of the motion of the wedge in downward direction). The block will remain at its position, as both the box and the inclined plane are falling with the same acceleration (g). 

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Newton's Laws of Motion - MCQ [पृष्ठ ७८]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 1 [English] Class 11 and 12
पाठ 5 Newton's Laws of Motion
MCQ | Q 11 | पृष्ठ ७८

संबंधित प्रश्‍न

A body of mass 0.40 kg moving initially with a constant speed of 10 m s–1 to the north is subject to a constant force of 8.0 N directed towards the south for 30 s. Take the instant the force is applied to be t = 0, the position of the body at that time to be x = 0, and predict its position at t = –5 s, 25 s, 100 s.


Two masses 8 kg and 12 kg are connected at the two ends of a light, inextensible string that goes over a frictionless pulley. Find the acceleration of the masses, and the tension in the string when the masses are released.


An aircraft executes a horizontal loop at a speed of 720 km/h with its wings banked at 15°. What is the radius of the loop?


You are travelling in a car. The driver suddenly applies the brakes and you are pushed forward. Why does this happen?


An object is placed far away from all the objects that can exert force on it. A frame of reference is constructed by taking the origin and axes fixed in this object. Will the frame be necessarily inertial?


Both the springs shown in the following figure are unstretched. If the block is displaced by a distance x and released, what will be the initial acceleration?


Let m1 = 1 kg, m2 = 2 kg and m3 = 3 kg in the following figure. Find the accelerations of m1, m2 and m3. The string from the upper pulley to m1 is 20 cm when the system is released from rest. How long will it take before m1 strikes the pulley?


Find the acceleration of the blocks A and B in the three situations shown in the following figure.


A tennis ball and a cricket ball , both are stationary. To start motion in them .


Define linear momentum and state its S.I. unit.


Two bodies A and B of same mass are moving with velocities v and 2v, respectively. Compare their (i) inertia and (ii) momentum.


A body of mass 5 kg is moving with velocity 2 m s-1. Calculate its linear momentum.


A bullet of mass 50 g moving with an initial velocity 100 m s-1 strikes a wooden block and comes to rest after penetrating a distance 2 cm in it. Calculate: (i) Initial momentum of the bullet, (ii) Final momentum of the bullet, (iii) Retardation caused by the wooden block and (iv) Resistive force exerted by the wooden block.


A stone is dropped freely from the top of a tower and it reaches the ground in 4 s. Taking g = 10m s-2, calculate the height of the tower.


ame the law of motion which gives the definition of force.


State Newton's second law of motion. Is Newton's first law of motion contained in Newton's second law of motion?


The INCORRECT statement about Newton's second law of motion is


A body of mass 2 kg travels according to the law x(t) = pt + qt2 + rt3 where p = 3 ms−1, q = 4 ms−2 and r = 5 ms−3. The force acting on the body at t = 2 seconds is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×