Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
25 N
100 N
50 N
40 N
Correct answer is C
Centripetal force,
F = \( \frac{mv^2}{r} \)
= \( \frac{2 \times 10^2}{4} \)
= \( \frac{200}{4} \)= 50N
90 m
30 m
45 m
60 m
Correct answer is C
S = (1)/2gt2
S = (1)/2 x (10)/1 x 32 =5 x 9 = 45 m
X and Y will be 500 m from each other
Y will be 500 m ahead of X
X will be 500 m ahead of Y
X and Y both be 500 m from the point of throw
Correct answer is D
v2 = U2 - 2G s
0 = 1002 - 2 x 10 x s = 10000 - 20s
s = (10000)/20 = 500m
Which is independent of mass.the two bodies where acted upon by the same retarding force of gravity which is independent of mass of the body; therefore both will be 500 m from the point of throw.
A man standing on a lift that is descending does not feel any weight because
the inside of the lift is air tight
the lift is in vacuum
the lift's acceleration is same as acceleration due to gravity
there is no gravitational pull on the man in the lift
Correct answer is C
The resultant force acting on the man is given by w = mg - R
Mg - mg = 0
The man feels weightless because the reaction, R is equal to the weight mg
Which of the following is a pure semiconductor?
carbon
silicon
transistor
phosphorus
Correct answer is B
A semiconductor is a material whose conductivity is between good conductor and insulator. Example of pure semi conductors are silicon and germanium