Frequently Asked Questions
Maximum value of static friction is called
A: Limiting friction
B: Rolling friction
C: Normal reaction
D: Coefficient of friction
Solution:
Explanation:
Limiting friction is the maximum value of the static friction. When a body overcomes the limiting friction, the body starts moving.
Final Answer:
Hence, option A is correct.
A running man has half the kinetic energy of that of a boy of half of his mass
The man speeds up by 1m/s , so that he has the same kinetic energy as that of the boy. The original speed of the man is?
Solution:
Two particles are projected simultaneously in the same
vertical plane, from the same point, both with different speeds and at different angles horizontally. The path followed by one, as seen by the other, is
A: a vertical line
B: a parabola
C: a hyperbola
D: a straight line making a constant angle ( ≠ 90 ^∘ ) with horizontal
Solution:
Explanation:-
which is a constant. So the path followed by one, as seen by the other, is a straight line, making a constant angle with the horizontal.
Final answer:-
Hence, the correct option is (D).
Give two examples of the following Random motion
Solution:
Explanation:-
If an object in motion has no particular direction and its motion shifts unexpectedly, then it is said to have random motion.
Final answer:-
The two examples of random motion are:
Motion of a football player.
Movement of a mosquito.
During an adiabatic process the pressure of a gas
is proportional to the cube of its adiabatic temperature.The value of Cp/Cv for that gas is :
A:4/3
B:2
C:5/3
D:3/2
Solution:
Explanation:-
Final answer:-
Hence, the correct option is (D).