Explosion
is the opposite of . . . . .
a) torque
b) momentum
c) collision
d) none of these
If the system is isolated, its total momentum during the explosion will be . . . . . .
a) conserved
b) not conserved
c) variable
d) all of these
A bullet of mass 0.008 kg is fired from Ak47 rifle with mass of 4 kg. If the velocity of the bullet is 715 m/s , what would be the recoil velocity of the gun?
a) -1.43 m/s
b) -1.43 m/s2
c) -2.34 m/s
d) -5.43 m/s
The giving acceleration to the rocket is called…
a) uniform acceleration
b) variable acceleration
c) thrust
d) both a & b
Friction:
The force that opposes the relative motion or attempted motion between systems in contact is called . . . . . . . .
a) torque
b) friction
c) gravity
d) stress
