B strength training I think that’s the answer
Answer:
Decreasing the number of warps of wire
Replacing the steel core of the magnet with a plastic core
Explanation:
But I’m not exactly sure about your answers these are the two answers I had
Answer:
The answer is below
Explanation:
a) The vertical displacement = Δy = 21.5 m - 1.5 m = 20 m
The horizontal displacement = Δx = 69 m wide
Using the formula:

Also:

b)The car is moving at a constant speed in the horizontal direction, hence the initial velocity = final velocity

Potential Energy = Mass * Gravitational Constant * Height
What We Don't Know: Potential Energy
What We Know:
Mass
Gravitational Constant (9.8 m/s)
Height
Ep = mgh
Ep = 4 * 9.8 * 2
Ep = 78.4 Joules
The Potential Energy of the Rock is 78.4 Joules, based on the given information! Hope this helps you!