Question

Jonathan is pushing a 25 kg box with a force of 135 N. The friction opposing the motion is unknown. The overall net force for the box is 70 N. Using this information calculate the magnitude of the frictional force of the box.

Answer 1

The magnitude of the frictional force of the box is 65 N

From the question given above, the following data were obtained:

• Mass (m) = 25 Kg
• Force applied (Fₐ) = 135 N
• Net force (Fₙ) = 70 N
• Frictional force (Fբ) =?

The frictional force acting on the box can be obtained as follow:

Fₙ = Fₐ – Fբ

70 = 135 – Fբ

Collect like terms

70 – 135 = – Fբ

–65 = –Fբ

Multiply through by –1

Fբ = 65 N

Thus, the frictional force of the box is 65 N

Learn more on Frictional force: brainly.com/question/25767576