Since the block slides across the floor at constant speed, this means that it's not accelerated.
According Newton's 2nd Law, if the acceleration is zero, the net force on the sliding mass must be zero.
This means that there must be a friction force opposing to the horizontal component of the applied force, equal in magnitude to it:

$F_{appx} = F_{app} * cos \theta = 295 N * cos 35 = 242 N (1)$

In the vertical direction, the block is not accelerated either, so the sum of the normal force and the vertical component of the applied force, must be equal in magnitude to the force of gravity on the block:

$F_{appy} = F_{app} * cos \theta = 295 N * sin 35 = 169 N (2)$

⇒ 169 N + Fn = Fg = 216 N (3)

This means that there must be a normal force equal to the difference between Fappy and Fg, as follows:
Fn = 216 N - 169 N = 47 N (4)

6 0

3 years ago

Sherita has a mass of 50 kg and slowly climbs up a 5 m high flight of stairs how much work dose sherita do in ascending the stai

elixir [45]

Work done = Mass * displacement
W = 50 * 5 = 250 watts

In short, Your Answer would be 250 watts

Hope this helps!

4 0

3 years ago

Question 2 An ideal gas in a piston/cylinder device is compressed at constant temperature. The entropy of the ideal gas will:

Flura [38]

To solve the problem it is necessary to refer to the definition of entropy.

Entropy is defined aso

$\Delta S = \frac{\Delta Q}{T}$

Where,

$\Delta Q =$ Heat exchange

T = Temperature

Since the heat exchange is conserved and it is an isothermal process where the temperature remains constant the change in entropy remains the same, ie $\Delta S = 0$ (Reamins same)

Therefore the correct answer is C.

8 0

4 years ago

What is the best example of forces acting in the same direction?

Tanya [424]

Answer:

Two football players pushing a tackling shed

Explanation:

They're working together to push it. (I also answered this and that was the correct answer)

8 0

3 years ago

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