Question 101: Laws of Motion

Question

A block of mass M placed inside a box descends vertically with acceleration 'a'. The block exerts a force equal to one-fourth of its weight on the floor of the box. The value of 'a' will be

Accepted Answer

Using Newton's second law
$$mg - {{mg} \over 4} = ma$$
$$ \Rightarrow a = {{3g} \over 4}$$

Answer

$${g \over 4}$$

Answer

$${g \over 2}$$

Answer

$${3g \over 4}$$

Answer

g

Laws of Motion

A block of mass M placed inside a box descends vertically with acceleration 'a'. The block exerts a force equal to one-fourth of its weight on the floor of the box. The value of 'a' will be

Choose the correct answer: