Answer:
F1= 588 N
F2= 784 N
Explanation:
Please see the attached file.
Plz help!! WILL MARK BRAINLIEST :)
1 answer:
You might be interested in
Answer:
(a) = -0.16%
(b) = smaller
Explanation:
given
power = 460 W
potential difference = 120 V
(a) what percentage will its heat output drop if the applied potential difference drops to 110 V ?
we know .....................(i)
we need to find change in power
..............(ii)
from equations we get
(b)
if we increase temperature resistance will increase and decrease with decrease in temperature and we know power is inversely proportional to resistance so if potential decrease and it would cause drop in power
and due to this increment of heating power resistance will decrease so actual drop in the power would be smaller
1) Work is the scalar quantity
2) The ideal mechanical advantage of the ramp is 2
Explanation:
1)
In physics, there are two types of quantities:
- Scalar quantity: a scalar quantity is a quantity having only a number and its units. Therefore, it has no direction. Examples of scalar quantities are: distance, speed, energy, mass, temperature...
- Vector quantity: a vector quantity is a quantity having both a magnitude (number+units) and a direction. Examples of vector quantities are: displacement, velocity, force, acceleration...
Let's analyze now the quantities given:
- work : it has only a magnitude, so it is a scalar
- displacement : it has a magnitude and a direction, so it is a vector
- parallel component of force : it has a magnitude and a direction, so it is a vector
- perpendicular component of force: it has a magnitude and a direction, so it is a vector
2)
The ideal mechanical advantage (IMA) of a machine is the mechanical advantage in absence of frictional forces, so when there are no loss of energy.
For a ramp, the IMA is calculated as
where
L is the length of the ramp
h is its height
For the ramp in this problem, we have
L = 6.00 m
h = 3.00 m
Therefore, its ideal mechanical advatnage is
Learn more about levers and other machines:
#LearnwithBrainly