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Chapter 3 - Motion and Force - 3
1.
The magnitude of velocity of a projectile at any instant is given by equation ___________..
a) aerodynamic
b) aerodynamic
c) √ (V
fx
)
2
+ (V
fy
)
2
d) inertia
2.
The range of a projectile is maximum when value of ___________
a) Distance
b) aerodynamic
c) inertia
d) aerodynamic
3.
The forces of gravity and air resistance are called ___________ forces.
a) aerodynamic
b) inertia
c) Distance
d) S = Vx t
4.
A ballistic missile moves freely due to __________.. under the action of gravity.
a) inertia
b) Distance
c) S = Vx t
d) F = mvf * mvi/T
5.
The area under a velocity - time graph gives
a) S = Vx t
b) F = mvf - mvi/T
c) Impulse
d) Distance
6.
The distance covered in time t by a body moving with variable velocity may be determined by
a) F = mvf - mvi/T
b) S = Vx t
c) Elastic collision
d) Impulse
7.
Newton�s second Law can be expressed as
a) Elastic collision
b) F = mvf - mvi/T
c) Impulse
d) 6ΔP / Δt = Rate of change in momentum
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