In A, the left side is exactly what you should write, to lead you to the answer ... correct units and everything. But when you tried to walk across the 'equals' sign, you slipped, fell, and got demolished on the rocks below. "19.6" is not the product of the things on the left side. Do the arithmetic again please.
B. When the height doubles, so does the potential energy.
Penelope is Your Answer!!! :)
Runner A is faster than runner B and Runner B has a head start.
<h3>What is a velocity time graph?</h3>
The velocity time graph shows us how fast that an object can be. The slope of the graph is the acceleration.
If we look at the graph as shown in the image attached to this answer, we can see that Runner A is faster than runner B and Runner B has a head start.
Learn more about velocity time graph:brainly.com/question/11290682
#SPJ1
7.5 N against each other
Given the mass of the two boxes are 4 kg and 6 kg
calculate the common acceleration of the two boxes when they join together
F = ma; m = (4 +6)kg and F = 15N
a = F/m
a = 15/10 = 1.5 m/s²
Calculate the impact force of 4 kg box on 6 kg box
F = ma
F = 4 X 1.5 = 6 N
Calculate the force of 5kg box when it accelerate on 1.5m/s²
F = ma
F = 5 X 1.5 = 7.5N
Calculate the opposing force of 5kg box
F = 15N -7.5N = 7.5N
Therefore, each box exerts a force of 7.5 to the other in opposite direction.
Learn more about Newton's Third Law of Motion here
brainly.com/question/62770
#SPJ4
