Question

A moving body is covering distances which are proportional to square of the time. Then, the acceleration of the body is ____________.

Options

• zero

• increasing

• constant but not zero

• decreasing

Answer 1

A moving body is covering distances which are proportional to square of the time. Then, the acceleration of the body is constant but not zero.

Explanation:

According to question,

`"s" ∝ "t"^2` or s = ct²

where, c = constant.

v = `"ds"/"dt"` = 2ct m/s

and a = `"dv"/"dt"` = 2c m/s²

∴ The body's acceleration is constant, but not zero.