If the body falls freely under gravity, then the gravitational acceleration is taken as
A. +8.9 m/s²
B. - 8.9m/s²
C. +9.8m/s²
D. - 9.8m/s²
Answer C
A couple produces
Answer B
The range of projectile(R) on an upward inclined plane is:
A.
B.
C.
D.
Answer D
The above figure shows the three coplaner forces P, Q and R acting at a point O. If these forces are in equilibrium, then
Explanation:
According to Lami's theorem option B is correct. If three concurrent forces acting on a body keep it in equilibrium then each force is proportional to the sine of angle between the other two forces.
The loss of kinetic energy during inelastic impact, is given by (where m1 = Mass of the first body,m2 = Mass of the second body, and u1 and u2 = Velocities of the first and second bodies respectively.)
B
Answer A
