ANSWER ALL QUESTIONS and show your work ON THE ATTACHMENT AWARD 50 pts if you don’t know the answer to all of them I have posted them individually so I can still mark you brainlessly (however you spell the darn thing)
Answer:
F = force
f = friction
u = coefficient of friction
R = normal reaction force
a = Acceleration
m = mass of block
g = gravity
f = uR
F = Ma
Say the block is moving to the right.
The 146N force thus acts to the right, and the friction force to the left, since it resists movement.
The 146N force acts to the right, but the horizontal component of it is 146 cos 50 = 93.84: So this is the force to the right.
Since F = uR and we're trying to find u, we need both F and R. R is easy to get since it is just m x g. This is in fact already given as the weight 350N. So R = 350.
The block is moving at a constant speed, so the force to the right must = the force to the left.
F = ma, so 93.84 - f = (350/g) x 0
This means f must be 93.84 also.
so we have f = uR,
93.84 = u x 350
so u = 0.268 or
0.27 to 2dp.
Hope you understand this.
Explanation:
The new acceleration is c) 18m/s/s
Explanation:
Net force, mass and acceleration of an object are related by Newton's second law of motion:
where
F is the net force on the object
m is its mass
a is its acceleration
In the first trial of this problem, a net force of is applied to the object, causing an acceleration of
Calling the mass of the object 'm', this means that
[N] (1)
In the second trial, the force applied is , so we have
where a' is the new acceleration. Substituting (1) into the second equation, we find:
This is because the acceleration is directly proportional to the force applied: therefore, if the force applied doubled, the acceleration doubles as well.
Learn more about Newton's second law:
brainly.com/question/3820012
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1 would use less energy. Please vote my answer brainliest! Thanks.
Answer:
35m/s
Explanation:
150 m/s divided by 4 is 35