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what is the acceleration produced in a freely falling body of mass 10 kg

A satellite S is moving in a circular orbit around the earth, then choose the correct option (The mass of the satellite is very small as compared to the mass of the earth).

If an unbalanced force is applied on an object that is at rest, then:

Why is the tip of an allpin made sharp ?

We know centre of mass of a body can lie outside of the body, like in case of a ring. Now let’s take a semicircular ring whose centre is at 0,0. Find the coordinate of it's center of mass.

Explain why, the motion of a body which is moving with constant speed in a circular path is said to be accelerated.

How displacement depends on the direction of motion

If Avogadro's number is $6\times {10}^{23}$, then the number of protons, neutrons and electrons in 14 g of ${}_6{C}^{14}$ are respectively:

The diameter of a thin wire can be measured by :

(a) a vernier callipers (b) a metre rule

(c) a screw gauge (d) none of these.

Why echoes can't be heard in a small room?

If '$i$' represents the angle of incidence and '$r$' represents the angle of reflection, then which of the following option(s) is true?

Calculate the force by which Earth is attracted by the Sun. Also, find the acceleration and speed of the Earth around the sun. Assume orbit to be circular. Data given, Mass of the Earth:6 x 1024 kg Mass of the Sun:2 x 1030 kg Average distance between Earth and Sun: 150 million km

The speed of highly penetrating ultrasonic waves is :

(a) lower than those of audible sound waves

(b) higher than those of audible sound waves

(c) much higher than those of audible sound waves

(d) same as those of audible sound waves

RELATE ONE ANGSTROM TO NANOMETRE

State and explain law of action and reaction.

Tinku dropped a stone into a very deep well. He hears the sound 6.53 s after he dropped the stone. Find the depth of the well. Take acceleration due to gravity, g =10 m/s² and vsound = 340 m/s.

In the above question how to solve equation √D/5 + D/340 = 6.53

Water flows through a tapering horizontal tube of radii of cross section of the ends $r_1$ = 20 cm and $r_2$ = 10 cm. The velocity of water at the points for the radius of cross section $r_1$ is $v_1$ = 1m/sec. Find the force imparted by the emerging water at the other end of the tube.

Difference between direction and displacement . All points

An object undergoes an acceleration of 8m/s^2 starting from rest Find the dince travelled in one second

Velocity of a body is negative while going upwards or downwards?

What happened if we not conserve momentum

An object of mass m kg is travelling on a smooth straight road with a velocity of 54Kmph. It is stopped due to the application of brakes, which produces a uniform retardation, by exerting a constant resisting force F newton. The object covers a displacement of 56.25m. The numerical relation, between the force F and mass m will be:

A vessel of depth 2d cm is half filled with a liquid of refractive index ${\mu }_1$ and the upper half with a liquid of refractive index ${\mu }_2$. The apparent depth of the vessel seen perpendicularly is

Calculate the force required to accelerate a car from rest to a velocity of $30m{s}^{-1}$ in $10$ seconds. The mass of the car is $1500kg$.

A piece of wood of dimensions 1 m by 2 m by 3 m has mass of 2 kg. What is the density of wood? Would the wood float in water? ($d_{water}$ = 1000 $\frac{kg}{\left(m^3\right)}$)

If the mass of earth is increased by 25% without any change in its size. Then, its acceleration due to gravity:

Identify the energy conversions in a closed, working circuit that enables continuous flow of current in it.

What is the magnitude of force needed to produce an acceleration of $4\frac{m}{s^2}$ in a ball of $6kg$ ?

1 km/ h = ________ m/s

Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the figure. Which of the following material would the box be made up of?

Jyoti wants waves that can be propagated through solid then what types of waves should she think?

If a body has to be pushed along +X-axis. Then in which direction the force should be applied?

The slope of the given velocity-time graph in the time interval 2 second to 4 second is

Pick the correct formula of Newton's universal law of gravitation. All terms have usual meanings.

An object of weight 200 N is floating in a liquid. What is the magnitude of buoyant force acting on it ?

Water sprinkler, used for grass lawns, begins to rotate as soon as the water is supplied. Which of the following laws of motion is the cause of rotation of the water sprinkler?

A balloon starts rising from the surface of the earth. The ascension rate is constant and equal to v_{​​​​​​0}. due to the wind the balloon gather the horizontal velocity component v _x=a y where is a constant and why is the height of ascent find the total tangential and normal acceleration of the balloon.?

What is a transverse wave ? In which medium : solid, liquid or gas, can it be produced ?

State two applications of ultrasound.

There are two bodies A and B. A has a positive charge whereas B has no charge. When A and B are connected by a metallic wire, in what direction will the electrons flow?

The vector quantity is :

(a) work (b) pressure

(c) distance (d) velocity