CBSE
are two vectors given by and . The magnitude of the component of along is
A stone falls freely from rest and the total distance covered by it in the last second of its motion equals the distance covered by it in the first three seconds of its motion. The stone remains in the air for
6 s
5 s
7 s
4 s
A bullet is fired with a velocity u making an angle of 60° with the horizontal plane. The horizontal component of the velocity of the bullet when it reaches the maximum height is
u
0
Given . What is the angle between ?
30°
60°
90°
180°
A particle is projected at 60° to the horizontal with a kinetic energy KE. The kinetic energy at the highest point is
KE
zero
The angle subtended by the vector with the x-axis
A ball is projected horizontally with a velocity of 5 m/s from the top of a building 19.6 m high. How long will the ball take to hit the ground ?
2 s
3 s
The value of λ for which the two vectors and are perpendicular to each other is
2
- 2
3
- 3
A body is projected with a speed u m/s at an angle β with the horizontal. The kinetic energy at the highest point is th of the initial kinetic energy. The value of β is
30°
45°
60°
120°
If and a + b = c, the the angle included between is
90°
180°
120°
zero