### Physics - Newtons Laws of Motion

#### 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 person who is at rest on completely frictionless ice covering a pond can reach shore by the application of

• A Newton's first law of motion
• B Newton's second law of motion
• C Newton's third law of motion
• D Newton's first and third law of motion

#### Question - 3

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 - 4

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 - 5

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 - 6

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 - 7

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 - 8

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 - 9

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 - 10

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