A car is moving along east at \(10\) m/s and a bus is moving along north at \(10\) m/s. The velocity of the car with respect to the bus is along:
1. | North-East | 2. | South-East |
3. | North-West | 4. | South-West |
A particle starts moving from the origin in the XY plane and its velocity after time \(t\) is given by \(\overrightarrow{{v}}=4 \hat{{i}}+2 {t} \hat{{j}}\). The trajectory of the particle is correctly shown in the figure:
1. | 2. | ||
3. | 4. |
A body A is projected vertically upwards. Another body B of the same mass is projected at an angle of 60° with the horizontal. If both the bodies attain the same maximum height, the ratio of the initial kinetic energy of body A to that of body B is:
1.
2.
3.
4.
Particles P and Q are at and . Their velocities at these positions are and respectively. If they collide after one second, then the value of c is
(1) 1
(2) 2
(3) 3
(4) 4
Two projectiles are thrown at different angles but their ranges R are the same. If their times of flight are , then the product of their times of flight is proportional to
1.
2.
3.
4. R
It is raining at \(20\) m/s in still air. Now a wind starts blowing with speed \(10\) m/s in the north direction. If a cyclist starts moving at \(10\) m/s in the south direction, then the apparent velocity of rain with respect to a cyclist will be:
1. \(20\) m/s
2. \(20\sqrt{2}\) m/s
3. \(10 \sqrt{5}\) m/s
4. \(30\) m/s
A body of mass 2 kg is projected at a speed of 20 m/s from a pillar of height 40 m at an angle of 30° with the horizontal in an upward direction. The speed with which it will hit the ground is
(1) 30 m/s
(2) 20 m/s
(3) 25 m/s
(4) 40 m/s
Path of a projectile with respect to another projectile so long as both remain in the air is:
1. Circular
2. Parabolic
3. Straight
4. Hyperbolic
A particle is thrown with velocity u making an angle with the horizontal. It just crosses the top of two poles each of height h after 1 s and 3 s respectively. The time of flight of the particle is:
(1) 4 s
(2) 2 s
(3) 8 s
(4) 6 s
A projectile is moving in the XY plane such that the horizontal and vertical directions are along the X-axis and Y-axis respectively. The projectile is fired from the origin at a large height with initial velocity () m/s. The time after which instantaneous velocity of the projectile becomes perpendicular to its initial velocity is: (g=10m/s2)
(1) 7.5 s
(2) 14.5 s
(3) 5.5 s
(4) 10.5 s