Physics Test - ...

A uniform electric field of magnitude 245 V/m is directed in the negative y direction as shown in figure. The coordinates of point P and Q are (- 0.5m, - 0.8m) and (0.3m, 0.7m) respectively. Calculate the potential difference V_Q - V_P along the path shown in the figure,

A body projected horizontally with a velocity v from a height h has a range R. With what velocity this body has to be projected horizontally from a height h/2 to have the same range?

A body starts with velocity u and moves on a straight path with constant acceleration. When its velocity becomes 5u the acceleration is reversed in direction without changing the magnitude. When it returns to starting point its velocity becomes:

A body starting with a velocity v returns to its initial position after t second with the same speed along the same line. Acceleration of the particle is :

A sharp stone of mass 2 kg falls from a height of 10 m on sand and buries into the sand. It comes to rest in a time of 0.029 second. The depth through which it buries into sand is

When a train starting from rest is uniformly accelerating, a plumb bob hanging from the roof of a compartment is found to be inclined at an angle of 45⁰ with the vertical. The time taken by the train to travel a distance of 1/2 km will be nearly

Two bodies of different masses m_a and m_b are dropped from two different heights a and b respectively. Ratio of times taken by the two to drop through these distances is:

A stone dropped from the top of a tower covers 24.5 m in the last second of its fall. Height of the tower is

With two forces acting at a point, the maximum effect is obtained when their resultant is 4N. If they act at right angles, then their resultant is 3N. Then the forces are

A ball is released from the top of a tower of height h m. It takes T seconds to reach the ground. What is the position of the ball in T / 3 second?