A moving object has a kinetic energy of 20 J. if it's velocity doubles, it's kinetic energy would be

1) 40 J

2) 60 J

3) 80 J

4) 100 J

Which equation best describes the law of conservation of momentum?

A mover uses a ramp to push a stereo into the van. The ramp is 3 meters long and 1.5 meters high. What is the ideal mechanical advantage of this ramp?

An airplane travels southwest a distance of 650 km at a velocity of 430 km/h. How long does the trip take in hours?

What is the correct calculation for resistance when the current is 4 amps and the voltage is 24 volts? a) 24 volts - 4 amps = 20 ohms b) 24 volts + 4 amps = 28 ohms c) 24 volts * 4 amps = 96 ohms d) 24 volts : 4 amps = 6 ohms

Blocks A (mass 2.00 kg) and B (mass 10.00 kg, to the right of A) move on a frictionless, horizontal surface. Initially, block B is moving to the left at 0.500 m/s and block A is moving to the right at 2.00 m/s.

A tree is standing in the middle of a meadow. As you watch, the wind begins to blow and the tree bends. Which statement best explains how you could tell that a net force was acting on the tree? OA) The tree had momentum.

Consider two cars, a 700kg Porsche and a 600kg Honda Civic. The Porsche is speeding along at 40 m/s (mph) and the Civic is going half the speed at 20 m/s.

Which statement about an electron in the 4d state is correct? A. The magnitude of its orbital angular momentum is 6√ℏ. B. The largest orbital angular momentum it could have in any given direction is 4ℏ. C.

A D note has a frequency of 587.33 Hz. Calculate its wavelength in meters. The speed of sound is 343 m/s

A cyclist allows his bike to roll down a hill without pedaling. Towards the bottom of the hill he applies his brakes. The bike comes to a stop. Applying the brakes causes the brakes to warm up. Describe the energy transfers that have occurred.