Answer:
Force applied by bull dozer is 3333.33 joules.
Explanation:
Answer:
123.48J
Explanation:
Given parameters:
Mass of the ball = 2.8kg
Height = 4.5m
Unknown:
Potential energy = ?
Solution:
The potential energy is the energy due to the position of a body. It is mathematically given as;
P.E = mgh
m is the mass
g is the acceleration due to gravity
h is the height
Now insert the parameters and solve;
P.E = 2.8 x 4.5 x 9.8 = 123.48J
Answer:
the lowest point, where the amount of energy is the greatest
Explanation:
The correct answer is "The roller coaster cars determine the amount of kinetic energy in the system. It’s the only part of the system that moves. Kinetic energy depends on the velocity and mass of a moving object."
Answer:
F = -3120 N
Explanation:
Lets write out everything we have:
Lineman:
m = 120kg
V1 = 6.5m/s
v2 = 0
t = 0.25
We should find acceleration, to move on to the next step;
a = v2-v1 / t
a = 0 - 6.5 / 0.25
a = -26m/s^2
Now we can use the Fnet formula and solve for F;
Fnet = ma
fnet = (120)(-26)
F = -3120 N