Answer:
a. Acceleration = 1.75 m/s²
b. Force = 105 Newton.
Explanation:
<u>Given the following data:</u>
Mass = 60kg
Final velocity = 7m/s
Time = 4 seconds
Required to find the acceleration and force of the body;
a. To find the acceleration;
Mathematically, acceleration is given by the equation;
Where;
- a is acceleration measured in
- v and u is final and initial velocity respectively, measured in
- t is time measured in seconds.
Since the elevator is starting from rest, its initial velocity is equal to 0m/s.
Substituting into the equation, we have;
<em>Acceleration = 1.75 m/s²</em>
b. To find the force;
Substituting into the equation, we have;
<em>Force = 105 Newton. </em>
Answer:
The speed when se reaches the top of the incline is 0.28 m/s
Explanation:
The work done is equal to the change of kinetic energy, then:
Wg + Wf + Wn = ΔEk
Where
Wg = work done by gravity
Wf = work done by force
Wn = work done by normal force
Where
m = 8.5 kg
g = 9.8 m/s²
d = 39.93 m
F = 37.4 N
vf = 2 m/s
Replacing:
Answer:
4
Explanation:
You assume that when they were writing two zeroes after the decimal point, they wanted to show that these are significant in determining the precision of this number.
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a. <span>FM GmMmr2
</span>= 6.67 x 10-11N.m2kg27 .35 x 1022 kg 70 kg 3.78 x 108 m2
<span>= 2.40 x 10-3 N
b. </span><span>FE GmEmr2
= 6.67 x 10-11 N.m2kg 25 .97 x 1034 kg (70kg) 6.38 x 106 m2
=685 N
FMFE 2.40 x 10-3N685 N= 0.0004%</span>
Mechanical advantage is a measure of the force amplification achieved by using a tool.
