Looks wrong to me. Time can't be negative, can it? Also, shouldn't the answer be less than 3?You're making a sign error. Use the sign convention consistently. If down is negative, what should be the sign of s?Swetasuria said:
No. What you're calling 's' is really Δs, which is negative as the object is falling.Swetasuria said:
Looks good.Swetasuria said:
The time taken for a body under free fall does not change with height. This is because the time of free fall is determined by the acceleration due to gravity, which is constant regardless of the height at which the body is dropped.
Yes, the time taken for a body under free fall is affected by air resistance. As the body falls, it encounters air resistance, which slows down its acceleration. This results in a longer time of free fall compared to a body falling in a vacuum.
No, the mass of the body does not affect the time taken for free fall. This is because the acceleration due to gravity is independent of the mass of the body. Therefore, regardless of the mass, the time of free fall will be the same.
The time taken for free fall on the moon is longer than on Earth. This is because the moon has a weaker gravitational pull compared to Earth. Therefore, the acceleration due to gravity on the moon is lower, resulting in a longer time of free fall.
Yes, the time taken for free fall can be calculated using the formula t = √(2h/g), where t is the time, h is the height, and g is the acceleration due to gravity. This formula applies to objects falling in a vacuum, without air resistance.