YASH CLASSES
MOTION IN
A PLANE [ XI
]
12. A projectile is fired horizontally
with a velocity of
98m/s from a cliff
490 m high. calculate
(a) time
taken to reach the ground (b) distance of the target
from the cliff
(c)
the velocity with which
the projectile hits the ground .
13. A projectile is fired horizontally
with a velocity of
125m/s from a cliff
375 m high. calculate
(a) time
taken to reach the ground (b) distance of the target
from the cliff
(c)
the velocity with which
the projectile hits the
ground .
14. A projectile is fired horizontally
with a velocity of
135m/s from a cliff
270 m high. calculate
(a) time
taken to reach the ground (b) distance of the target
from the cliff
(c)
the velocity with which
the projectile hits the ground .
15. At same point
two thrown simultaneously. A is thrown vertically with velocity 20m/s
and B thrown 20m/s with angle 60° with the vertical . determine the separation between
the two balls at t = 1 second .
16. At
same point two thrown
simultaneously. A is thrown vertically with velocity 20m/s
and B thrown 30m/s with angle 45° with the vertical . determine the separation between
the two balls at t = 2 second .