A. 15 m
B. 20 m
C. 5 m
D. 25 m
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15
The range of the projectile at 30 deg and 60 deg are__________________?
0
The force beared by a wall on which water strikes normally at a speed of 10m/sec and at a discharge of 0.0001m3/sec is__________________?
A. equal to 45 deg
B. equal to 90 deg
C. equal to each other
D. none of the above
0
The trajectory (or path) of a projectile is_________________?
A. 1 N
B. 10 N
C. 100 N
D. none
0
The distance covered by a body in time t starting from rest is__________________?
A. straight line
B. parabola
C. hyperbola
D. circle
0
When two bodies move toward each other with constant speeds the distance between them decreases at the rate of 6m / sec. If they move in the same direction the distance between them increases at the rate of 4m/sec. Then their speeds are________________?
A. at2/2
B. Vt
C. a2t/2
D. at2
0
The thrust on the rocket in the absence of gravitational force of attraction is__________________?
A. 5m/s, 1m/s
B. 3m/s, 3m/s
C. 6m/s, 1m/s
D. 4m/s, 2m/s
0
Which of the following is not an example of projectile motion ?
A. Constant
B. not constant
C. constant if the rate of ejected gases is constant
D. constant for short range rocket.
0
The acceleration in the rocket at any instant is proportional to the nth power of the velocity of the expelled gases. Where the value of n must be ?
A. a gas filled ballon
B. bullet fired from gun
C. a football kicked
D. a base ball shot
0
When collision between the bodies in a system is inelastic in nature then for system ____________________?
A. -1
B. 1
C. 2
D. -2
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