A 7700-kg box car traveling at 14 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s. What is the mass of the second car?

You observe a hockey puck of mass 0.12 kg, traveling across the ice at speed 18.3 m/sec. The interaction of the puck and the ice results in a frictional force on the puck, f = 0.14 N. Calculate: the stopping distance for this puck.

An elevator weighing 2.00 x 10 5 N is supported by a steel cable. What is the tension in the cable when the elevator is accelerated upward at a rate of 3.00 m/s2? (g = 9.81 m/s2) Show your work.

What are positive and negative effects we have on our atmosphere?

A balloon filled with helium gas at 1.00 atm occupies 15.6 L. Will the volume of the balloon increase or decrease in the upper atmosphere, at a pressure of 0.150 atm?

What is the resolution of the stopwatch

What does it mean when we say science is a cycle?

1) Which is a characteristic of a metal? A) It looks dull. B) It feels brittle. C) It is a good insulator. D) It is a good conductor of electricity. 2)

1:a boy 2 a girl pulling a heavy crate at the same time w/10 unite of force each. What is the net force acting on the object

Animals that can hear ultrasonic sounds are the what

If the rock has a mass of 1 kg which is the speed of the rock after it has fallen for two seconds