Assertion: In javelin throw, the athlete throws the projectile at an angle slightly more than 45o.
Reason: The maximum range does not depend upon the angle of projection.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true and reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false
Assertion: The apparent weight of a body in an elevator moving with some downward acceleration is less than the actual weight of a body.
Reason: The part of the weight is spent in producing downward acceleration, when body
is in elevator.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false.
If both assertion and reason are false.
B.
If both assertion and reason are true but reason is not the correct explanation of assertion
The apparent weight of a body in an elevator moving with downward acceleration is given by
W = m( g - α )
Assertion: A horse has to pull a cart harder during the first few steps of his motion.
Reason: The first few steps are always difficult.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: A wheel moving down a perfectly frictionless inclined plane will undergo slipping (not rolling motion)
Reason: For perfect rolling motion, work done against friction is zero.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion: A hollow shaft is found to be stronger than a solid shaft made of same material.
Reason: The torque required to produce a given twist in hollow cylinder is greater than that required to twist a solid cylinder of same size and material.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion: If momentum of a body increase by 50%, its kinetic energy will increase by 125 %.
Result: Kinetic energy is proportional to square of velocity.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion: The difference in the value of acceleration due to gravity at pole and equator is proportional to square of angular velocity of earth.
Reason: The value of acceleration due to gravity is minimum at the equator and maximum at the pole.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Two masses M1 = 5 kg and M2 = 10 kg are connected at the ends of an inextensible string passing over a frictionless pulley as shown. When the masses are released, then the acceleration of the masses will be
g
g/2
g/3
g/4
A uniform string is vibrating with a fundamental frequency ' f ' . The new frequency, if radius & length both are doubled would be
2f
3f
Two spherical soap bubbles of radii a and b in vacuum coaleasce under isothermal conditions. The resulting bubbles has a radius given by
a+ b