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प्रश्न
______ is used to change the speed of the car.
उत्तर
Acceleration is used to change the speed of the car.
APPEARS IN
संबंधित प्रश्न
Fill in the following blank with suitable word :
The value of g on the earth is about………………. of that on the moon.
Explain why the value of g is zero at the centre of the earth.
The radius of planet A is half the radius of planet B. If the mass of A is MA, what must be the mass of B so that the value of g on B is half that of its value on A?
The radius of the earth is. 6400 km and that of mars is 3200 km. The mass of the earth is about 10 times the mass of mars. Weight of the object on the earth is 200 N. What will be its weight on the mars?
A wire AB is carrying steady current 'I1' and is kept on the table. Another wire CD carrying current 'I2' is held parallel and directly above AB at a distance 'r'. When wire CD is left free and it remains suspended at its position, its mass per unit length is (g =acceleration due to gravity) ____________.
The force of attraction between two unit point masses separated by a unit distance is called
A body is thrown from the surface of the earth with velocity 'u' m/s. The maximum height in m above the surface of the earth upto which it will reach is ______.
(R = radius of earth, g = acceleration due to gravity)
The difference in the acceleration due to gravity at the pole and equator is ______.
(g = acceleration due to gravity, R = radius of the earth; θ = latitude, ω = angular velocity, cos0° = 1, cos90° = 0)
If the change in the value of g at the height h above the surface of the earth is the same as at a depth x below it, then ______.
(both x and h being much smaller than the radius of the earth)
The mass of a spaceship is 1000 kg. It is to be launched from the earth's surface out into free space. The value of g and R are 10 m/s2 and 6400 km, respectively. The required energy for this work will be ______.
