A driver in a 1000kg car traveling at 24m/s slams on the brakes and skids to a stop. If the coefficient of friction between the tires and the level road is 0.80, how long will the skid marks be?
A) 30 m B) 34 m C) 46 m D) 37 m
D
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At an instant when a particle of mass 80 g has a velocity of 25 m/s in the positive y direction, a 75-g particle has a velocity of 20 m/s in the positive x direction. What is the speed of the center of mass of this two-particle system at this instant?
a. 16 m/s b. 45 m/s c. 23 m/s d. 20 m/s e. 36 m/s
What method was used to determine the absolute ages of the lunar rock samples from the Apollo missions?
a. electromagnetic measuring b. radar imaging c. telescopic observations d. microscopic evaluation e. radioactive dating
Free Fall: A ball is thrown straight up with a speed of 30 m/s, and air resistance is negligible.(a) How long does it take the ball to reach the maximum height?(b) What is the maximum height reached by the ball?(c) What is its speed after 4.2 s?
What will be an ideal response?
The colors you see with a prism result because the light is diffracted
Indicate whether the statement is true or false