Advertisements
Advertisements
प्रश्न
On the earth, a stone is thrown from a height in a direction parallel to the earth’s surface while another stone is simultaneously dropped from the same height. Which stone would reach the ground first and why?
Advertisements
उत्तर
A stone is thrown from a height in a direction parallel to the earth’s surface, i.e., the stone is given initial velocity in the horizontal direction.
For the vertical motion of the stone, u = 0, a – g and s = h
Using s = `"ut" + 1/2 "at"^2`
we get t = `sqrt((2"h")/"g")`
Similarly, for the second stone, vertical motion is the same as that of the first. So, both the stones would reach the ground simultaneously.
APPEARS IN
संबंधित प्रश्न
If the value of g suddenly becomes twice its value, it will become two times more difficult to pull a heavy object along the floor. Why?
Write scientific reasons.
The value of acceleration g is greater at the pole than at the equator.
The acceleration due to gravity on moon is `(1/6)^"th"` times the acceleration due to gravity on earth. If the ratio of the density of earth 'ρe' to the density of moon 'ρm' is `5/3`, then the radius of moon 'Rm' in terms of the radius of earth 'Re' is ______.
At a height R above the earth's surface, the gravitational acceleration is ______.
(R = radius of earth, g = acceleration due to gravity on earth's surface.)
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) ____________.
A lift of mass 'm' is connected to a rope which is moving upward with maximum acceleration 'a'. For maximum safe stress, the elastic limit of the rope is 'T'. The minimum diameter of the rope is ______.
(g = gravitational acceleration)
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)
Which formula correctly represents the acceleration due to gravity at Earth's surface?
A monkey of mass 50 kg climbs on a rope which can withstand the tension (T) of 350 N. If monkey initially climbs down with an acceleration of 4 m/s2 and then climbs up with an acceleration of 5m/s2. Choose the correct option (g = 10 m/s2).
The value of acceleration due to gravity at Earth’s surface is 9.8 ms−2. The altitude above its surface at which the acceleration due to gravity decreases to 4.9 ms−2, is close to ______.
(Radius of earth = 6.4 × 106 m)
