You are asked to help design a new type of loop-the-loop ride. Instead of rolling down a long hill to generate the speed to go a
round the loop, the 310 kg cart starts at rest(with two passengers) on a track at the same level as the bottom of the 9.6 m radius loop. The cart is pressed against a compressed spring that, when released, launches the cart along the track around the loop.
Part A
Choose a spring of the appropriate spring constant to launch the cart so that the downward force exerted by the track on the cart as it passes the top of the loop is 0.2 times the force that Earth exerts on the cart. The spring is initially compressed 6.0 m .
Express your answer to two significant figures and include the appropriate units.
Part A
Choose a spring of the appropriate spring constant to launch the cart so that the downward force exerted by the track on the cart as it passes the top of the loop is 0.2 times the force that Earth exerts on the cart. The spring is initially compressed 6.0 m .
Express your answer to two significant figures and include the appropriate units.
1 answer:
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Okay, haven't done physics in years, let's see if I remember this.
So Coulomb's Law states that
so if we double the charge on 
and double the distance to 
we plug these into the equation to find
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So we see the new force is exactly 1/2 of the old force so your answer should be
if I can remember my physics correctly.
So Coulomb's Law states that
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So we see the new force is exactly 1/2 of the old force so your answer should be
Answer:
The magnitude of the average induced emf in the wire during this time is 9.533 V.
Explanation:
Given that,
Radius r= 0.63 m
Magnetic field B= 0.219 T
Time t= 0.0572 s
We need to calculate the average induce emf in the wire during this time
Using formula of induce emf
.....(I)
In reshaping of wire, circumstance must remain same.
We calculate the length when wire is in two loops
The length when wire is in one loop
We need to calculate the initial area
Put the value into the formula
The final area is
Put the value of initial area and final area in the equation (I)
Negative sign shows the direction of induced emf.
Hence, The magnitude of the average induced emf in the wire during this time is 9.533 V.