Yes because the tree would be laying on the ground still
Answer:
58.0 m/s
Explanation:
We can solve the problem by using the following SUVAT equation:
where
v is the final velocity of the roller coaster
u = 13 m/s is the initial velocity
a = 4.0 m/s^2 is the acceleration
s = 400 m is the displacement
Substituting and solving for v, we find
Answer:
Explanation:
As we know that the magnitude of electric field intensity is given as
now we know that intensity of the wave is given as the product of energy density and speed of the wave
so intensity is the energy flow per unit area per unit of time
so the energy that flows through the area of 0.0259 m^2 in 11.7 s is given as
Answer:
a) 4.1 J
b) -14 J
c) 4.8 m/s
Explanation:
The energy stored in the spring is given by:
The mechanical energy loss is because of the work done by the friction force.
The friction force (only presented on the inclined surface) is given by:
We need to calculate the length of the ramp in order to calculate the work, the length of the ramp is the hypotenuse:
So the work done by the friction force is:
the angle is 180 degrees because the force is opposite to the motion.
In order the know the final velocity we need to apply the Energy Conservation Theorem: