If a train going 80 m/min hits the

brakes, and it takes the train 2.5

seconds to stop, what is the

train's acceleration?

What is an object's change in position, or displacement, and the change in time over which that displacement occurred used to calculate? a. average velocity b. inertia c. average force d. force of gravity

Planet x has twice earth's mass and three times earth's radius

Which of these instruments can be used to peedict a thunderstorm?

A shot putter releases the shot some distance above the level ground with a velocity of 12.0 m/s, 51.0 degrees above the horizontal. The shot hits the ground 2.08s later. You can ignore air resistance.

1 km is equal to Select one: a. 100 m b. 10000 dm c. 1000 mm d. 1000 cm

The force of friction on a sliding object is 10n. the applied force needed to maintain a constant velocity is:

What is the best hypothesis to use for this investigation

Quantum physics would most likely be needed to understand the motion of which of the following? A. an atom B. a cell C. a ball D. a galaxy

Sharon throws a 0.20 Kg with an acceleration of 10 m/s/s. (a) What force did she exert on the ball? (b) What force did the ball exert on her?

What are three ways that extra carbon is getting to the atmosphere?