Part A:
For this part we’re assuming all the kinetic energy of the moving bumper car is converted into elastic potential energy in the spring since the car is brought to rest. Therefore you can find the total kinetic energy to get your answer:
KE = ½ mv^2
KE = ½ (200)(8)^2
KE = 6400 J
Part B:
Now you can use Hooke’s law to find the force:
F = kx
F = (5000)(0.2)
F = 1000 N
C light energy
The solar energy from the sun converts to chemical potential energy
Answer:
A 3.0 kg mass moving at 9.0 m/s has more momentum than taht of a 5.0 kg mass moving at 5.0 m/s
Explanation:
given two masses m1 and m2 and their corresponding velocities v1 and v2
m1 = 3 kg
m2 = 5 kg
v1 = 9 m/s
v2 = 5 m/s
To calculate momentum of the masses:
We know that the momentum is given by the equation:
p = mv, where m is mass and v is velocity
momentum of mass m1 , p1 = m1 x v1
= 3 x 9 = 27 kg.m/s
momentum of mass m2, p2 = m2 x v2
= 5 x 5 = 25 kg.m/s
Hence p1>p2
Comparing above momentum value, it is inferred that the momentum of mass 3.0 kg is more that the momentum of mass 5.0 kg.
Answer:
To obtain fair results
Explanation:
if we don't measure the results might give unfair results