JEE Physics - Laws Of Motion

Buy JEE Main Engineering Entrance Exam (Pro) Practice test pack

Question - 1

The greatest and least values of the resultant of two forces \((F_{1}andF_{2})\) acting at a point are 98 N and 58.8 N respectively.

  • A \(F_{1}\) and \(F_{2}\) must have values lying between 98 N and 58.8 N
  • B The smaller of the two forces must be greater than 58.8 N
  • C The greater of the two forces must be greater than 98 N
  • D The greater of the two forces must be 8 kg f.

Question - 2

A 10 kgf- force is applied at one end of a spring balance and an equal stretching force is applied at the other end at the same time.  The reading of the balance will be

  • A zero
  • B 10 kgf
  • C 20 kgf
  • D 25 kgf

Question - 3

A cricket ball of mass 150 g is thrown with an initial speed of 72 km \(h^{-1}\).  The batsman deflects it by an angle of \(45^{o}\) withour change in its speed.  If bat interacts with the ball for a short duration of 50 ms, the force imparted by the batsman to the ball is

  • A 155 N
  • B 111 N
  • C 1110 N
  • D None of the above

Question - 4

A person who is at rest on completely frictionless ice covering a lape, could reach shore by

  • A rolling
  • B kicking his feet
  • C swinging his arms keeping his back towards the shore
  • D swinging his arms keeping his front towards the shore

Question - 5

If a body of mass 3 kg is moving on a circular path with radius to 3m with a velocity of 2 \(ms^{-1}\) and acceleration of  1 \(ms^{-2}\).  The ratio of normal force to ner force is

  • A 0.8
  • B 0.5
  • C 0.6
  • D 1.0

Question - 6

For the same coefficient  of friction between the road and the tyre, the stopping distance of vehicle from specified velocity on applying brakes

  • A increases with weight of vehicle
  • B decreases with weight of vehicle
  • C remains same irrespective of weight of vehicle
  • D is upredictable

Question - 7

A train is moving at a constant speed along a straight level track.  Then

  • A the frictional force is zero
  • B the frictional force on the engine and the coach acts in the same direction
  • C the pushing force is greater than the frictional force
  • D the resultant of all the forces acting on the train is zero

Question - 8

The force of friction

  • A is directly proportional to ares of contact between the surfaces for a given load.
  • B does not always oppose the relative motion of one surface over another.
  • C acts parallel to the instantaneous velocity of a body
  • D acts parallel to but opposite in direction to the instaneous velocity of a body.

Question - 9

An object with a mass of 1 kg at rent on the surface of the Earth at the Equator.  The weight of the object is

  • A 9.80 N
  • B 9.77 N
  • C 10.0 N
  • D zero

Question - 10

A spacehip is travelling in deep space and is under-going an acceleration of 9.8 \(ms^{-2}\) relative to an inertial reference frame.  The weight of a 2 kg-object that rests on the floor of the space ship cabin is (in N)

  • A zero
  • B 19.6
  • C 39.2
  • D due to reaction force on the object from floor and hence the object will be weightless
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next