D | Question 18 2 pts A crate of mass 54.0 kg is being pushed by a 308 N to the

Question

D | Question 18 2 pts A crate of mass 54.0 kg is being pushed by a 308 N to the right and the acceleration of the crate is given by a 3.00 m/s2. Determine the amount (magnitude) of friction (in Newtons) between the crate and floor Note: Round your final answer to 3 sig. fig. Do NOT write units. | Question 19 4 pts Conservation of Mechanical Energy. You throw a 0.150 kg baseball straight up in the air. giving it an initial upward velocity with magnitude 20.0 m/s. Use conservation of energy to find how high (in meters) it goes, ignoring air resistance. Note: Round your final answer to 3 sig. fig. Do NOT write units.

Explanation / Answer

Problem 18)

Given,

Mass of crate, m = 54 kg

Force, F = 308 N

Acceleration of crate, a = 3 m/s^2

Let us assume that frictional force be f

ma = F - f

(54 x 3) = 308 - f

So, frictional force, f = 146 N

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