Question

8. A particle moves in a circle of radius 5 cm with constant speed and time period 0.2 ts. the acceleration of
the particle is
a) 15ms -2
b) 25ms-2
c) 36ms-2
d) 5ms-2
9. A stone tied to the end of a string 100cm long is whirled in a horizontal circle with a constant speed.
If the stone makes 14 revolutions in 25 second, what is the acceleration of the stone?
3 ms 6) 252 ms c ms?
d) Ems-2
10. A body is falling freely under gravity. The distances covered by the body in first, secod and third
minutes of its motion are in the ratio
a) 1:4:9
b) 1: 2:3
c) 1:3:5
d) 1: 5:6
11. If the magnitude of sum of two vectors is equal to the magnitude of difference of the two vectors, the angle
between these vectors is
a)45°
b) 180°
c) 0°
d) 90°
12. A boy standing at the top of a tower of 20m height drops a stone. Assuming g = 10ms-2.the velocity with which
it hits the ground is
a) 10 ms-
1
b ) 20 ms -1
c) 40 ms -1
d) 5 ms -1
13. A particle starts its motion from rest under the action of a constant force. If the distance covered in first 10
seconds is S, and that covered in the first 20 seconds is Sz.then
a) 52 = 36
6) S₂ = 45
c) S₂ = 51
d) S2 = 25,
14. Identify the vector quantity among the following
a) Distance
b) angular momentum c) heat
d) electrical energy
15. Two projectiles of same mass and with same velocity are thrown at angle 60° and 30° with the horizontal, and then
which will remain same
a) Time of flight b ) range of projectile c) maximum height reached d) all of them
a) 45​

Answer 1

Answer:

wow vw the me to send it out the window of the time you took my in my opinion of my favorite place and a chance I can I have attached