Answer:
A
Contact forces are forces that require the actual contact (touching) of two pieces of matter. ... A field force is a force that works at a distance. No touching is required. Gravity is a good example of a field force, because it works whether or not an object is touching something or touching nothing at all.
Do the same thing you were doing
Answer:
The initial speed of the 1kg block is 8 m/s.
Explanation:
The question simply asks for the initial speed of the 1.00 kg block.
The initial kinetic energy of the 1kg block is = 32 Joules
Using this kinetic energy, and the equation below, we can find the speed of the 1kg block:
Kinetic Energy = 


v = 8 m/s
The initial speed of the 1kg block is 8 m/s.
Answer:
I have made a mistake in my answer
Answer:
0.064 m
Explanation:
When a spring is stretched/compressed, the force exerted in the spring is related to the elongation of the spring by the equation:

where:
F is the force applied
k is the spring constant
x is the stretching/compression of the spring
In this problem, we have:
is the force applied by the kid on the spring
k = 128 N/m is the spring constant
Solving for x, we find how far the spring stretches:
