Answer:
if we want to find force by using newton's law equation ( f = ma ) we have to use mass and acceleration not velocity ,but in this question they did not mention about acceleration but speed so the answer is D
Answer:
The molecules of different liquids have different size and mass. The mass and size of the molecules in a liquid and how closely they are packed together determine the density of the liquid. Just like a solid, the density of a liquid equals the mass of the liquid divided by its volume; D = m/v. The density of water is 1 gram per cubic centimeter.
Explanation:
Initially the ball pass the pole after 0.5 s
and then after 4.1 s again it will reach the top of the pole
So time taken by the ball to cover the distance above the pole is


now the time it will take to reach the highest point from the top of the pole is given as


now the total time to reach the top from the bottom is given as

so the initial speed by which it will throw is given as



also the speed after 0.5 s


so the height of the pole is given as


<em>so height of the pole is 10 m</em>
Always stop as soon as you can at a safe place and shut the engine off when the warning/gauge light goes on in a vehicle.
Is D) Zeroes and One's :))))