Question

Learning Goal:

To use the principle of linear impulse to determine the change in velocity of a box subject to multiple forces.

The block shown in (Figure 1) has mass m = 48 kg and is subjected to forces F1 = 300 N at an angle θ = 40 ∘ below the horizontal and F2 = 60 N . The coefficient of kinetic friction between the box and the surface is μk = 0.15. What is the velocity of the box after 15 s if it starts at rest?

A)What is the magnitude of the normal force between the box and the ground?

B)What is the impulse in the horizontal direction due to F1?

C)What is the impulse in the horizontal direction due to F2?

D)What is the impulse in the horizontal direction due to friction?

E)What is the velocity of the box after 15 s ?

Answer 1