Physics Past Questions and Answers

Which of the following statements about static friction is correct? It

A Is independent of the nature of the surface in contact
B Depends on the area of surface in contact
C Depends on the relative motion between the surface in contact
D Depends on the weight of the moving body

Question 1337:

Which of the following statements about moving particle is correct?

A If the resultant force acting on the particle is zero, then it is in dynamic equillibrium
B If the resultant force acting on the acting on the particle is greater than zero, then it is moving with a uniform velocity
C The rate of change of its momentum with time tales place in a direction opposite to that of its motion
D The particle falling freely covers equal distances in equal time interval

Question 1338:

Two cars X and Y travelling in opposite directions along the same high way at uniform velocities 110 kmh^-1 and 90kmh^-1 respectively pass each other at a certain point. The velocity of X relative to Y at the time they pass each other is

A 200 kmh^-1
B 100 kmh^-1
C 40 kmh^-1
D 20 kmh^-1

Question 1339:

The average speed of an object is determined by dividing the sum of its initial and final speeds by two only when the acceleration is

A Changing
B Uniform
C Increasing
D Decreasing

Question 1340:

a body is projected horizonatlly from the top of a cliff 45m above the ground. if the body lands at a distance 30m from the foot of the cliff, calculate the speed of projection. [g = 10ms^-2]

A 10ms^-1
B 15ms^-1
C 20ms^-1
D 30ms^-1