An insect moves along the sides of a wall of dimension 12m×5m, starting from one corner and reaches the diagonally opposite corner. If the insect takes 2s for its motion, then find the ratio of average speed to average velocity of insect.

A 60 kg skydiver moving at terminal speed 40 m in 2 seconds. The sky diver is spending a power of ___ KW.

A piece of stone is thrown vertically upwards. It reaches the maximum height in 3 seconds. If the acceleration of the stone be 9.8m/s2 directed towards the ground, calculate the initial velocity of the stone with which it is thrown upwards.

When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

Find the height of the lamp post by using the concept of similar triangles ?

Assume the distance between sun and mirror is infinity and the sun is much above the principal axis. Where will the image of the sun be formed?

The correct relation between heat produced, H and electric current, I flowing is

Why does a person fall when he jumps out form a moving train?

Question 15 (a) State the rule to determine the direction of a (i) magnetic field produced around a straight conductor-carrying current.

A hockey player pushes the ball on the ground. It comes to rest after travelling a certain distance because:

If ammeter shows electric current of magnitude 10 A . Then what would be the reading of voltmeter placed across the given resistor?

Describe the effect of force acting upon an object when Air resistance is greater than the force of gravity?

A body of volume 50 centimetre cube is completely immersed in water. Find the force of buoyancy on it.

Find the scalar and vector from the following speed, distance, current, time, velocity, pressure , work done, Momentum and acceleration

The different types of reflecting telescope are