Question

Hafthor bjornson broke the deadlift record in April 2020, lifting 501kg. A) How much weight (in N) did he lift?B) How hard was the floor pushing up on the weights when they were on the floor?

Answer 1

Given, the mass that Hafthor Bjornson lifted, m=501 kg

A)

The weight is given by the product of the mass and the acceleration due to gravity.

Thus the weight lifted by him is,

`\begin{gathered} W=mg \\ =501*9.8 \\ =4909.8\text{ N} \end{gathered}`

Thus the weight he lifted is 4909.8 N

B)

When the weight is on the floor the force applied by the floor on the weights is equal to the weight itself. This force is called the normal force.

Thus the force applied by the floor on the weights is 4909.8 N