A 2.8-kg tool can move on a perfectly smooth ramp that slants at 42° above the horizontal. What are the magnitude and direction of the acceleration of this tool if it is sliding (a) up the ram, (b) down the ramp?
What will be an ideal response?
(a) 6.6 m/s2 down the ramp (b) 6.6 m/s2 down the ramp
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Standing Waves on a String: Standing waves of frequency 17 Hz are produced on a string that has a mass per unit length of 0.0160 kg/m. To what tension must the string be stretched between two supports if adjacent nodes in the standing wave are to be 0.87 m apart?
Fill in the blank(s) with the appropriate word(s).
A 10-solar-mass star is about ten times more luminous than a 1-solar-mass star
Indicate whether the statement is true or false
Equilibrium: When a car is weighed, it is driven slowly on a horizontal floor over a scale that records a reading as the front wheels go over the scale, and then records a second reading as the rear wheels go over the scale. The weight of the car is equal to
A. the weight under the front wheels. B. the weight under the rear wheels. C. the average of the two weights. D. the sum of the two weights. E. the difference of the two weights.
A cyclotron is designed to accelerate protons to a maximum kinetic energy K. Assuming one then tried to accelerate alpha particles (about four times the mass and twice the charge), what kinetic energy can be achieved?
A. K B. 2K C. 1/2K D. 1/4K E. 4K F. 8K