If the gravitational acceleration at any place is doubled, then the weight of a body will be
A. g/2
B. g²
C. g
D. 2g
Answer D
The moment of inertia of a thin disc of mass m and radius r, about an axis through its centre of gravity and perpendicular to the plane of the disc is
A. mr²/2
B. mr²/4
C. mr²/6
D. mr²/8
Correct Answer: Option A
When two elastic bodies collide with each other,
A. the two bodies will momentarily come to rest after collision
B. the two bodies tend to compress and deform at the surface of contact
C. the two bodies begin to regain their original shape
D. all of the above
The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is
A. ?/2
B. 30° + ?/2
C. 45° + ?/2
D. 60° + ?/2
Answer C
The law of motion involved in the recoil of gun is:
A. Newton's first law
B. Newton's second law
C. Newton's thrid law
D. Newton's gravitational law
