हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान कक्षा ११

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

Advertisements
Advertisements

प्रश्न

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

विकल्प

  • the engine of the car

  • the driver of the car

  • the earth

  • the road

MCQ
Advertisements

उत्तर

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
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 5: Newton's Laws of Motion - MCQ [पृष्ठ ७७]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 1 [English] Class 11 and 12
अध्याय 5 Newton's Laws of Motion
MCQ | Q 3 | पृष्ठ ७७

संबंधित प्रश्न

A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 ms–1. How long does the body take to stop?


A person drops a coin. Describe the path of the coin as seen by the person if he is in

  1. a car moving at constant velocity and
  2. in a free falling elevator.

A free 238U nucleus kept in a train emits an alpha particle. When the train is stationary, a nucleus decays and a passenger measures that the separation between the alpha particle and the recoiling nucleus becomes x at time t after the decay. If the decay takes place while the train is moving at a uniform velocity v, the distance between the alpha particle and the recoiling nucleus at a time t after the decay, as measured by the passenger, is


In a TV picture tube, electrons are ejected from the cathode with negligible speed and they attain a velocity of 5 × 106 m/s in travelling one centimetre. Assuming straight-line motion, find the constant force exerted on the electrons. The mass of an electron is 9.1 × 10−31 kg.


Find the mass M of the hanging block in the following figure that will prevent the smaller block from slipping over the triangular block. All the surfaces are frictionless and the strings and the pulleys are light.


In the following figure shows a man of mass 60 kg standing on a light weighing machine kept in a box of mass 30 kg. The box is hanging from a pulley fixed to the ceiling by a light rope, the other end of which is held by the man himself. If the man manages to keep the box at rest, what is the weight recorded on the machine? What force should he exert on the rope to record his correct weight on the machine?


Use Newton's second law of motion to explain the following instance :
An athlete prefers to land on sand instead of hard floor while taking a high jump .


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.


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.


A ball is thrown vertically upwards. It returns 6 s later. Calculate the greatest height reached by the ball. (Take g = 10 m s−2)


Multiple Choice Question. Select the correct option.

Which of the following are vector quantities?


Name the physical entity used for quantifying the motion of a body.


Which of the following has the largest inertia?


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


Name the physical quantity which equals the rate of change of linear momentum.


What do you mean by linear momentum of a body? A force causes an acceleration of 10 ms-2 in a body of mass 1 kg. What acceleration will be caused by the same force in a body of mass 4 kg?


A stone is dropped from a cliff 98 m high.
What will be its speed when it strikes the ground?


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


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×