In Hooke's law, what does k represent?

a. mass of the spring

b. length of the spring

c. force of the spring

d. stiffness of the spring

e. width of the spring

A 1500 kg roller coaster train is at rest at the top of a 65 m drop before it begins to travel down the hill. At the bottom of the hill how fast is the train moving?

A boat is travelling at a velocity of 45m/s S. if the current of the river is moving at a velocity of 15m/s due east, what is the resultant velocity of the boat

A bird flies 2.8 due west and then 2.7 due north. Another bird flies 2.7 due west and 2.8 due north. What is the angle between the net displacement vectors for the two birds?

Which of the following would increase friction? A. Motor oil B. Soap C. Sand D. Water

A string is strung horizontally with a fixed tension. A wave of frequency 90 Hz is sent along the string, and it has a wave speed of 55.1 m/s. Then a second wave, one of frequency 180 Hz, is sent along the string.

How does mass affect the speed of an object

Which of the following tools can be used to determine humidity? Select all that apply. Barometer Hygrometers Anemometer Hair Thermometer [can use more than one answer]

For a cars speedometer what is the calculated speed over an entire trip

How does gravity influence our annual calendar?

A 0.500 kg block is sitting on a horizontal, frictionless surface. The block is connected to a horizontal spring with a force constant of 124 N/m. The other end of the horizontal spring rests against a wall. When a 100.