2nd law of motion gives the definition of:
A. force
B. acceleration
C. velocity
D. both force and acceleration
Which law of motion is also called law of inertia:
A. 1st law
B. 2nd law
C. 3rd law
D. all 1st, 2nd and 3rd laws
In vibrating cord the points where the amplitude is maximum, are called:
A. antinodes
B. nodes
C. troughs
D. crests
Waves transmit _____from one place to another:
A. energy
B. mass
C. both
D. none
The range of the projectile at 30 deg and 60 deg are:
A. equal to 45 deg
B. equal to 90 deg
C. equal to each other
D. none of the above
The trajectory (or path) of a projectile is:
A. straight line
B. parabola
C. hyperbola
D. circle
The distance covered by a body in time t starting from rest is:
A. at2/2
B. Vt
C. a2t/2
D. at2
Newton estimated the speed of sound:
A. 281m/sec
B. 333m/sec
C. 340m/sec
D. all of the above
Silence zone takes place due to:
A. constructive interference
B. destructive interference
C. beats
D. resonance
Ultrasonic have:
A. frequency in the audible range
B. frequency is greater than 20 kHz
C. frequency lower than 20 Hz
D. all of above
