Question

A clarinetist, setting out for a performance, grabs his 3.130 kg3.130 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 29.17 N.29.17 N. Find the case's vertical acceleration. Indicate an upward acceleration as positive and a downward one as negative. Use for g=9.810 m/s2g=9.810 m/s2 for the acceleration due to gravity.

Answer 1

-0.49 m/s²

Step-by-step explanation:

Given that.

Mass of the clarinet case, m = 3.13 kg

Force acting on the case upwards, F(u) = 29.17 N

Gravitational force acting on the case, F(g)

We will use this very simple equation to understand the relationship between the 3 forces

Applied Force - Gravitational Force = Net Force, or symbolically represented by

F(u) - F(g) = F. If we go ahead to substitute, we have something like

29.17 - (3.13 * 9.81) = F

F = 29.17 - 30.71

F = -1.54 N

This means that the clarinet will accelerate downwards.

Now, Remember also, F = ma. So that

a = F/m

a = -1.54 / 3.13

a = -0.49 m/s²

This thus, is a negative acceleration