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Questions in physics

[Answered] What is needed to know: Right now we are doing Unit 1, which is about tensions in ropes, weight, and topics related to Newtons. We are taking a test tomorrow, and I studied the book. What is the main stuff I need to know for tomorrow?

[Answered] A mountain climber stands at the top of a 50-meter cliff hanging over a calm pool of water. The climber throws two stones vertically 1 second apart and observes that they cause a single splash when they hit the water. The first stone has an initial velocity of +2.0 meters per second. What will the velocity of each stone be at the instant both stones hit the water?

[Answered] Speed with direction is called __________.

[Answered] During a _____ change, a system absorbs energy from its surroundings.

[Answered] You want to describe the harmonic motion of a swing. You find out that it takes 2 seconds for the swing to complete one cycle. What is the swing's period and frequency?

[Answered] All living things break down _________ to make energy.

[Answered] The Thunderbolt bobsled team is training for Olympic Gold. During practice, they start a run with a speed of 0.57 m/s and complete the 1360 m run in 89.49 seconds. What is the acceleration of the sled?

[Answered] What mass of water will fill a tank that is 100.0 cm long, 50.0 cm wide, and 30.0 cm high? Express the answer in grams.

[Answered] Does the speedometer of a car read average speed or instantaneous speed?

[Answered] The amount of kinetic energy a moving object has depends on its mass and its velocity.