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A 1000-kg car travels along a straight 500-m portion of the highway (from A to B) at a constant speed of 10 m/s. At B, the car encounters an unbanked curve of radius 50 m. The car follows the road from B to C travelling at a constant speed of 10 m/s while the direction of the car changes from east to south. What is the magnitude of the frictional force (Centripetal force) between the tires and the road as the car negotiates the curve from B to C?

1. 0.02

Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth. [2 MARKS]

Which all of the following statements(s) is/are true regarding liquid pressure?

Which of the following is the SI unit of velocity?

A boy is running with a velocity of $2m{s}^{-1}$. He jumps over a stationary cart of $2kg$ while running. If the mass of the boy is of $20kg$, find the velocity at which the cart moves after he jumps over the cart. (Neglect friction between the cart and ground)

A bus can be stopped by applying a retarding force F when it is moving with a speed v on a level road. The distance covered by it before coming to rest is s. If the load of the bus increases by 50 % because of passengers, for the same speed and same retarding force, the distance covered by the bus to come to rest shall be

Area under velocity-time graph depicts a physical quantity that has the unit as _____.

What is the least count of a stopwatch if there are 50 divisions between 0 and 5 s mark?

How much work is being done by $14V$ battery to transfer a charge of $1C$ in a conductor?

Are The walls of the classroom are In motion or in rest? According to me in rest but as we say that the earth rotates so every object weather man , animal , tree , bus , car everything if it is stationary but will also be considered as motion is it so why what is the reason are they in rest or in motion

Mass of a proton is __ times the mass of an electron.

When two or more cells are joined together, they form a ___ .

A block of iron sinks in fluid A but floats in another liquid B, this is because:

A ray of light is incident at ${60}^{\circ }$, on glass-air interface. Then the light ray will-

Use : [${\mu }_w$ = $\sqrt{2}$ , ${\mu }_a$ = 1]

As action and reaction forces are equal and opposite why do not they cancel each other

It is easier to lift a heavy stone under water than in air. Explain.

While an athlete is running at a constant acceleration of $4.5m/s^2$, he exerts a force of $300N$. What is the mass of the athlete?

A car is moving along a straight road at a steady speed. It travels 150 m in 5 seconds:

(a) What is its average speed?

(b) How far does it travel in 1 second ?

(c) How far does it travel in 6 seconds ?

(d) How long does it take to travel 240 m ?

An object moves with an acceleration of $3$ ${ms}^{-2}$ when a force of $30N$ is applied. The mass of the body is ____ $kg$.

Describe momentum and how inertia

What is zero error

The ___ at any point on magnetic field line gives the direction of magnetic field at that point.

The fossil fuels which are replenished again are called

A metallic wire of resistance R is melted and recast to half of its original length while maintaining the original volume. What will the new resistance of the wire be?

According to the second law of motion, force applied on an object is given by:

Relative Density of silver is 10.5. The density of silver in SI unit is

A pendulum has a frequency of 5 vibrations per second. An observer starts the pendulum and fires a gun simultaneously. He hears the echo from the cliff after 8 vibrations of the pendulum. If the velocity of sound in air is 340 m $s^{-1}$, find the distance between the cliff and the observer.

What is the force of gravity on a body of mass 150 kg lying on the surface of the earth?
(Mass of earth =$6\times {10}^{24}$ kg; Radius of earth = $6.4\times {10}^{6}m;G=6.7\times {10}^{-11}N{m}^2/k{g}^2$)

If a car travels 50 m distance in 4 s with a acceleration of 5m/s^{​​​​​​2}​​​​​ , then what was it's initial speed?

At what height above the earth's surface the value of g will be half of that on the earth's surface ?

When energy is supplied to electrons of n^thorbit, which of the following is most likely to happen?

A bullet of mass 100 g is shot at a velocity of 1000 km/hr towards the target. What would be it's kinetic energy?

A string of length $1.5m$ is tied to a stone of mass of $0.2kg$ and is made to revolve at a speed of $1.2m{s}^{-1}$. What is the centripetal force experienced by the stone?

You are provided with a hollow iron ball A of volume 15 $c{m}^3$ and mass 12 g and a solid iron ball B of mass 12 g. Both are placed on the surface of water contained in a large tub.

(a) Find upthrust on each ball.
(b) Which ball wil sink ? Give reason for your answer. (Density of iron = 8.0 g $c{m}^{-3})$

A ball of mass 20 g is moving with a velocity of 40 $m{s}^{-1}$.On applying some constant force for 2 seconds it acquires a velocity of 80 $m{s}^{-1}$. What is the value of force?

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