Physics
Vectors and Equilibrium
Page 21 of 25
#161 for which the range and maximum height become equal?
A) $tan^{-1}(1/4)$
B) $tan^{-1}(4)$
C) $tan^{-1}(1/2)$
D) $tan^{-1}(2)$
#162 Time rate of change of momentum is equal to
A) Force
B) Impulse
C) Velocity
D) Both A and C
#163 The angle of projection, at which the range of projectile would become half of its maximum value.
A) $45^{\circ}$
B) $30^{\circ}$
C) $15^{\circ}$
D) $60^{\circ}$
#164 Swimming is possible on account of
A) 1st law of motion
B) 2nd law of motion
C) 3rd law of motion
D) Newton’s law of Gravitation
#165 If the momentum of a body changes from 100 N s to 200 N s in 10 s then the unbalance external force responsible to change the momentum is
A) 5 N
B) 2.5 N
C) 2 N
D) 10 N
#166 An object is projected with 10 $ms^{-1}$ at angle of $60^{\circ}$ with the horizontal its range will be (Take g = 10 $ms^{-2}$):
A) $5\sqrt{3}$ m
B) $10\sqrt{3}$ m
C) $3\sqrt{5}/5$ m
D) None
#167 Velocity and acceleration are in the same direction when
A) Velocity of a car is increasing on a straight road
B) Velocity of a car is decreasing on a straight road
C) Car is turning round a corner
D) None of these
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