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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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?
If a scientific model generates a prediction that is not confirmed experimentally,
A) the experimental data must be modified to be consistent with the model B) it must be initially revised and eventually abandoned if it continues to be inconsistent with experiments C) it must be assumed that there are errors in the experiment D) it must immediately be abandoned
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