Neap tides occur at first and third quarter phases of the Moon
Indicate whether the statement is true or false
TRUE
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A particle experiences a force given by F(x) = ? - ?x3. Find the potential field U(x) the particle is in. (Assume that the zero of potential energy is located at x = 0.)
A) U(x) = -?x + x4 B) U(x) = ?x - x4 C) U(x) = 3?x2 D) U(x) = -3?x2
The figure below shows a planet traveling in a counterclockwise direction on an elliptical path around a star located at one focus of the ellipse. When the planet is at point A,
A. its speed is constant. B. its speed is increasing. C. its speed is decreasing. D. its speed is a maximum. E. its speed is a minimum.
You are driving in your car with a sack of groceries in the seat next to you. You see a light change and you slow down and the sack remains on the seat. Suddenly the car in front of you slams on the brakes, and you are forced to brake harder
The groceries slide off the seat. Explain what happened.
Samantha pushes a 60-N crate up a ramp 30 m in length and inclined at 10° with the horizontal. What potential energy change does the crate experience?
a. 1.8E+3 J b. 1.8E+3 J c. 1.2E+1 J d. 3.1E+2 J e. 1.0E+4 J