The horizontal surface on which the block slides is frictionless. The speed of the block before it touches the spring is 6.0 m/s. How fast is the block moving at the instant the spring has been compressed 15 cm? k = 2.0 kN/m
a.
3.7 m/s
b.
4.4 m/s
c.
4.9 m/s
d.
5.4 m/s
e.
14 m/s
a
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If a scientific model generates a prediction that is not confirmed experimentally,
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Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.Linear momentum is not conserved
a. True b. False Indicate whether the statement is true or false
A container is filled with water and the pressure at the bottom of the container is P. Then the container is emptied halfway and topped off with oil of density 0.8 × 10^3 kg/m3, which floats on top of the water. What is the pressure at the bottom of the container now?
a. a pressure < P b. the same pressure P c. a pressure > P d. This is unable to be determined with the information given. e. a pressure < 0.5P
A car originally traveling at 30 m/s manages to brake for 5.0 seconds while traveling 125 m downhill. At that point the brakes fail. After an additional 5.0 seconds it travels an additional 150 m down the hill. What was the acceleration of the car after the brakes failed?