(11%) Problem 4: A block with mass m 15 kg is sitting on a horizontal surface an
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(11%) Problem 4: A block with mass m 15 kg is sitting on a horizontal surface and not moving. The free-fall acceleration is g- 9.81 m/s. Please answer the following questions. 20% Part (a) Write an expression for the magnitude of the force of gravity Fg on the block. Grac Ded Potes Subr Atter detai Submit Hint Feedback: 0% deduction per feedback. Hints:0% deduction per hint. Hints remaining: 1 20% Part (b) Calculate the magnitude of the force of gravity Fg on the block in Newtons 2096 Part (c) In what direction is the force of gravity in this problem? 20% Part (d) what is the magnitude of the normal force Fv in Newtons? 2096 Part (e) In what direction does the normal force act?Explanation / Answer
a)
Fg = m*g
b)
Fg = m*g
= 15 Kg * 9.81 m/s^2
= 147 N
Answer: 147 N
c)
Force of gravity acts in downward direction
d)
In vertical direction, only 2 forces are acting
Fg which acts downward
N which acts upward.
Since object is not moving,
N = Fg
= 147 N
Answer: 147 N
e)
Normal force is acting in upward direction
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