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A 840kg car moving at 1.7m/s brakes to a stop in 5 s. The magnitude of the braking force in N is - 285.6 A ball is thrown straight upward into the air. Neglect air resistance. While the ball is in the air, its acceleration - remains constant A car accelerates from rest for 3 seconds until it rea...

Acceleration is the measure of the change in what? a. density b. motion c. velocity d. mass e. speed - c. velocity One half second after starting from rest, a freely falling object will have a speed of about a. 20 m/s b. 10 m/s c. 5 m/s d. 2.5 m/s e. None of the above - c. 5 m/s The slop...

If you look up in the sky at the sun, you are seeing the sun in its current state as it is at this exact moment. True or False? - False What is the name of the star that is currently closest to the North Celestial Pole? - Polaris What is the name of the group of constellations which the sun moves...

What is the speed of light? - Light can travel enormous distances under short periods of time. It is faster than any other phenomenon. It takes about 8 minutes for light to travel from the Sun to Earth. The speed of light in a vacuum is c=3x10^8 m/s. Why is light such an important tool for astron...