Answer:
I'm not sure if you maybe forgot to add in some information but I can give you the equation you will need to solve this..! (just without the bit of infomration you might need)
In this case you'll be solving for t and I can help you with your first step, you'll divide 2 by 4, getting you to:
'Doing work' is a way of transferring energy from one object to another, energy is transferred when a force moves through a distance.
If i explain with formula
Work done (J) = Energy transferred (J)
So more energy, more work done bc u transferred more energy to move the object and doing the work. and if you only use a little of energy, the work done also only a little.
Answer:
1) The car is slowing down
2) A = 40N forward & B = 25N up
Explanation:
Whenever you're dealing with forces on moving objects, it is important to look at each of the numbers and the directions they're going in.
With the racecar, we see it has four forces on it, 2,000 N up and down, 8,000 back, and 6,000 N forward. Now, each of these forces are going in their respective directions, but they are most in comparison with the force going in the opposite direction (vertical axis, horizontal axis). The two 2,000 N forces will cancel each other out since there is an equal force in both directions, causing a net force of <u>0 N on the vertical axis</u>. This is because the car is most likely moving on a flat surface. As for the horizontal axis, we simply subtract 6,000 & 8,000 to get a net force of <u>-2,000 N in the backwards direction</u>, telling us that the car is slowing down.
As for the boxes, we see the same vertical and horizontal axes, but separated to each box. Box A has a net force of <u>40 N in the forward direction</u> and Box B has a net force of <u>25 N in the upward direction</u>.
Answer:
The maximum force on the supporting cable is 80688 N.
The minimum force on the supporting cable is -164 N.
Explanation:
For maximum force movement of elevator is in upward direction. Thus, equation of motion is given by,
ma = T - mg
where m is the mass of elevator
a is acceleration of elevator
g is acceleration due to gravity
T is the maximum tension in the supporting cable
T = ma + mg
T = m (a + g)
T = 4100 ( 0.04g + 9.8)
T = 80688 N
This is the maximum force on the supporting cable.
For minimum force movement of elevator is in downward direction. Thus, equation of motion is given by,
ma = T - mg
where m is the mass of elevator
a= -0.04g is acceleration of elevator because elevator is moving downward
g is acceleration due to gravity
T is the minimum tension in the supporting cable
T = ma + mg
T = m (a + g)
T = 4100 ( 9.8 - 0.04g)
T = -164 N
This is the minimum force on the supporting cable.
