English
Karnataka Board PUCPUC Science Class 11

A Car Accelerates on a Horizontal Road Due to the Force Exerted By. - Physics

Advertisements
Advertisements

Question

A car accelerates on a horizontal road due to the force exerted by.

Options

  • the engine of the car

  • the driver of the car

  • the earth

  • the road

MCQ

Solution

the road

The car pushes the ground in the backward direction and according to the third law of motion, reaction force of the ground in the forward direction acts on the car.

shaalaa.com
  Is there an error in this question or solution?
Chapter 5: Newton's Laws of Motion - MCQ [Page 77]

APPEARS IN

HC Verma Concepts of Physics Vol. 1 [English] Class 11 and 12
Chapter 5 Newton's Laws of Motion
MCQ | Q 3 | Page 77

RELATED QUESTIONS

The below figure shows the position-time graph of a particle of mass 4 kg.

  1. What is the force on the particle for t < 0, t > 4 s, 0 < t < 4 s?
  2. What is the impulse at t = 0 and t = 4 s? (Consider one-dimensional motion only.)


A block of mass 15 kg is placed on a long trolley. The coefficient of static friction between the block and the trolley is 0.18. The trolley accelerates from rest with 0.5 ms–2 for 20 s and then moves with uniform velocity. Discuss the motion of the block as viewed by (a) a stationary observer on the ground, (b) an observer moving with the trolley.


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


 car moving at 40 km/hr is to be stopped by applying brakes in the next 4 m. If the car weighs 2000 kg, what average force must be applied to stop it?


A block of mass 0.2 kg is suspended from the ceiling by a light string. A second block of mass 0.3 kg is suspended from the first block by another string. Find the tensions in the two strings. Take g = 10 m/s2.


A small block B is placed on another block A of mass 5 kg and length 20 cm. Initially, the block B is near the right end of block A (In the following Figure). A constant horizontal force of 10 N is applied to the block A. All the surfaces are assumed frictionless. Find the time that elapses before block B separates from A.


Consider the situation shown in the following figure  All the surfaces are frictionless and the string and the pulley are light. Find the magnitude of acceleration of the two blocks.


In the following figure, m1 = 5 kg, m2 = 2 kg and F = 1 N. Find the acceleration of either block. Describe the motion of m1 if the string breaks but F continues to act.


In the previous problem, suppose m2 = 2.0 kg and m3 = 3.0 kg. What should be the mass m, so that it remains at rest?


A block is kept on the floor of an elevator at rest. The elevator starts descending with an acceleration of 12 m/s2. Find the displacement of the block during the first 0.2 s after the start. Take g = 10 m/s2.


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


A body of mass m moving with a velocity v is acted upon by a force. Write an expression for change in momentum in each of the following cases: (i) When v << c, (ii) When v → c and (iii) When v << c but m does not remain constant. Here, c is the speed of light.


Use Newton's second law of motion to explain the following instance : 

A cricketer pulls his hands back while catching a fast moving cricket ball .


A force of 10 N acts on a body of mass 2 kg for 3 s, initially at rest. Calculate : Change in momentum of the body.


State the magnitude and direction of the force of gravity acting on the body of mass 5 kg. Take g = 9.8 m s-2.


Multiple Choice Question. Select the correct option.

The impulse of a body is equal to:


What causes motion in a body?


Why is it advantageous to turn before taking a long jump?


A hockey player is moving northward and suddenly turns westward with the same speed to avoid an opponent. The force that acts on the player is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×