Question

C. K/4
a. K
c. 76°
a. 0°
b. only tangential acceleration
A ball is projected with kinetic energy "k" at an angle of 30° to the horizontal, at the high
5. If a body moves with variable speel
a. only centripetal acceleration
c. neither centripetal nor tangential acceleration
e. none of these
d. both centripetal and tangential acceleration
point during its flight, its kinetic energy will be
b. K/2
d. Zero
e. 3/4K
At what angle of projection, the horizontal range is equal to maximum height
a. 30°
b. 45°
d. none of these
When a body moves in circle, the angle between its linear velocity and angular velocity
b. 90°
C. 180°
d. none of these
With what velocity projectile is projected at angle of 60° with horizontal remains in air
second and covered horizontal range 4 km.
a. 2000m/sec b. 4000m/sec C. 6000m/sec d. 8000m/sec e. none of these
What is initial velocity of a mortar shell fired at an angle 15° and its range is 16 ft
a. 16ft/sec b. 32ft/sec c. 64ft/sec d. none of these
A car going around a certain curve as a speed of 10m/sec, has centripetal force on it
speed of car is 72 km/sec then centripetal force becomes.
a. 25 N
b. 50 N
c. 200 N
d. 400N
In hydrogen atom an electron revolves with a period 6.28 second. Then its angular ve
e. none of these
a. one radian/sec
b. two radian/sec
die
one of thorn​

Answer 1

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