A skateboarder has an acceleration of - 1.9 m/s2. If her initial speed is 6 m/s how long does it take her to stop?

A. 4.1s

B. 3.2s

C. 0.32s

D. 2.1s

A 0.4 kg object that stretches a spring 8.8 cm from its natural length when hanging at rest oscillates with an amplitude of 4.1 cm. Find the total energy of the system. The acceleration due to gravity is 9.81 m/s2. Answer in units of J.

How would you describe the shape of the trajectory of a projectile

6. Your friend is going 30 mph, when she slams on the brakes. If you are not wearing a safety belt. Which way does your body move? How fast will you be going when you slam into the windshield? Explain why you move this way in terms your inertia.

Which type of material would be best to use for construction in an area prone to earthquakes? concrete brick wood stone

Resonance can be looked at as forced vibration with the A) least amount of energy input. B) maximum amount of energy input. C) matching of wave amplitudes. D) matching of constructive and destructive interference. E) minimum beat frequency.

A roller coaster track is a good example of the law of conservation of energy. Use this law to explain these facts about a roller coaster track. a. The largest hill for a roller coaster track is the first hill on the track.

Which statement about the spectrum of light that emerges from a prism is true? A. High-frequency colors bend more than low-frequency colors. B. High-frequency colors bend less than low-frequency colors. C.

What kind of process can create "rogue" waves? a. Constructive interference c. Refraction b. Destructive interference d. Standing waves

What are constellations? 1. Apparent groupings of stars and planets visible on a given evening 2. Groups of galaxies gravitationally bound and close together in the sky 3.

What is pitch? give an example of a high pitch sound a low pitch sound