According to the law of conservation of energy, A)
an object loses most of its energy as friction.
B)
the total amount of energy for a system stays the same.
C)
the potential energy of an object is always greater than its kinetic energy.
D)
the kinetic energy of an object is always greater than its potential energy.

How will the system respond to a temperature increase?

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?