Options:
- A. 5m/s, 1m/s
- B. 3m/s, 3m/s
- C. 6m/s, 1m/s
- D. 4m/s, 2m/s
View Answer
A. 5m/s, 1m/s
Physics
Why Ballistic missile fails in some circumstances of precision ?
Options:
- A. due to their shape
- B. due to air resistance
- C. due to angle of projection
- D. all of these
View Answer
B. due to air resistance
The distance covered by a body in time t starting from rest is__________________?
Options:
- A. at2/2
- B. Vt
- C. a2t/2
- D. at2
View Answer
A. at2/2
A body is moving with uniform velocity. Its______________________?
Options:
- A. speed changes
- B. acceleration changes
- C. direction of motion changes
- D. displacement from origin changes
View Answer
D. displacement from origin changes
The trajectory (or path) of a projectile is_________________?
Options:
- A. straight line
- B. parabola
- C. hyperbola
- D. circle
View Answer
B. parabola
When velocity time graph is a straight line parallel to time axis then__________________?
Options:
- A. acceleration is const
- B. acceleration is variable
- C. acceleration is zero
- D. velocity is zero
View Answer
C. acceleration is zero
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__________________?
Options:
- A. 1 N
- B. 10 N
- C. 100 N
- D. none
View Answer
A. 1 N
Slope of velocity time graph is_____________________?
Options:
- A. acceleration
- B. distance
- C. force
- D. momentum
View Answer
A. acceleration
The range of the projectile at 30 deg and 60 deg are__________________?
Options:
- A. equal to 45 deg
- B. equal to 90 deg
- C. equal to each other
- D. none of the above
View Answer
C. equal to each other
Which law of motion is also called law of inertia ?
Options:
- A. 1st law
- B. 2nd law
- C. 3rd law
- D. all 1st, 2nd and 3rd laws
View Answer
A. 1st law