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A body is said to be at rest if it does not change its ___________with respect to a reference point.

In the figure shown below, current is flowing in the anticlockwise direction in a loop of wire. The part of the loop that faces towards you is the

A body starts at a point and reaches the same point after time $t$. Which of the following represents its displacement time graph?

Can you walk on a frictionless surface ? Why / Why not ?

State the law which governs the energy flow in an ecosystem.

The area under a velocity-time graph is represented by the unit:

The value of Universal Gravitational constant is:

Due to the stretching the length increase by 20%, then the corresponding change in the resistance is

A ship was moving at a speed of $500m{s}^{-1}$ and it attained speed of 600 $m{s}^{-1}$ in 5 seconds. What is the acceleration of the ship?

A ray of light is incident at an angle of ${45}^{\circ }$ on a square slab of a transparent material. What should be the refractive index of the material of the slab so that the emergent ray travels along the vertical face AB?

During the night, an area of low pressure is formed on which of the following?

A batsman hits two balls of different masses $0.5kg$ and $1kg$ out of the stadium, the velocity with which these balls travel is the same. What would be the ratio of their kinetic energies?

In transverse waves, particles:

The figure shows elliptical orbit of a planet m about the sun 'S'. The shaded area SCD is twice the shaded are SAB. If $t_1$ is the time for the planet to move from C to D and $t_2$ is the time to move from A to B then:

Suppose you have a clinical thermometer in which bigger marks read one degree and there are 10 divisions between them. What is the minimum reading that you can take using this thermometer?

Differentiate between instantaneous velocity and average velocity using velocity time graph?

A steel tape is placed around the earth at the equator when the temperature is $10{}^{\circ }\text{C}$. What will be the clearance between the tape and the ground (assumed to be uniform) if the temperature of the tape rises to $40{}^{\circ }\text{C}$ ?

Neglect expansion of the earth. The radius of earth at the equator is $6400\text{km}$ and ${\alpha }_{steel}=1.2\times {10}^{-5}{\text{K}}^{-1}.$

it is easier to stop a tennis ball than a cricket ball

Question 15

A car starts from rest and moves along the x-axis with constant acceleration $5m{s}^{-2}$ for 8 seconds. If it then continues with constant velocity, what distance will the car cover in 12 seconds since it started from the rest?

Which of the following time periods of a sound wave would result in the highest pitch?

The figure above shows distance-time graphs of two objects X and Y. Which object is moving with greater speed?

In the following figure, a body starts from G, and reaches D via A, B and C.





Calculate the ratio of the total distance travelled to the total displacement of the body if the curves GA and BC have the same radius, and all the lengths given are in feet.

A concrete sphere of radius R has a cavity of radius r which is packed with sawdust. The relative densities of concrete and sawdust are 2.4 and 0.3 respectively. For this sphere to float with its entire volume submerged under water, the ratio of the mass of concrete to the mass of sawdust will be

Hydraulic lift working is based on

If the velocity time graph is some straight line parallel to the x axis, then definitely