Question
part b and d
bisch "My Blackboard Cont The Expert Tap4m Cengage Student trevor.c. Online HW 04 Begin Date: 9 22/2017 5.00:00 PMDue Date: 9/29 2017 300:00 PM End Date: 106 2017 3:0 00:00 PM (10%) Problem 2: A block with mass m-4 kg is sitting on a horizontal surface and not moving. The free fall acceleration in SI 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. 20% Part (b) Calculate the magnitude of the force of gravity Fg on the block in Newtons. Dedu sin() | cos() | tan() | 1r cota asin) atan acotan sinh cosh tanb) acos) Attem DegreesRadians Submit Hine Hiats:1% dediction per hint Hints remaning. I Feedback:1 deduction per foedback -20% Part (c) In what direction is the force of grn ty in this problem? 20% Parl (d) What is the magnitude of the normal force Fy in Newtons? 20% Part (e) In what direction does the normal force act?
Explanation / Answer
2) Given,
m = 4 kg
a)Since the box is sitting on a flat surface, the force of gravity will be:
F = mg
b)F = mg
F = 4 x 9.81 = 39.24 N
Hence, F = 39.24 N
c)Gravity always acts downwards
d)Since the block is on frictioness flat surface, the Normal force is
N = mg = 4 x 9.81 = 39.24 N
Hence, N = 37.24 N
e)Normal force acts upwards.
