Magnitude and direction of acceleration of a sailboat
The force exerted by the wind on the sails of a sailboat is Fsail = 380 N north. The water exerts a force of Fkeel = 200 N east. If the boat (including its crew) has a mass of 260 kg, what are the magnitude and direction of its acceleration?
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The kinetic energy of a rocket is increased by a factor of eight after its engines are fired, whereas its total mass is reduced by half through the burning of fuel. By what factor is the magnitude of its momentum changed? Hint: Use KE = p2/2m.
A 40.0-N crate starting at rest slides down a rough 6.00-m-long ramp, inclined at 30.0° with the horizontal. The magnitude of the force of friction between the crate and the ramp is 6.0 N. What is the speed of the crate at the bottom of the in
In a game of billiards, a red billiard ball is traveling in the positive x-direction with speed v and the cue ball is traveling in the negative x-direction with speed 3v when the two balls collide head on. Which statement is true concerning their
A rifle with a barrel length of 60 cm fires a 12 g bullet with a horizontal speed of360 m/s. The bullet strikes a block of wood and penetrates to a depth of 11 cm. How long does it take the bullet to come to rest?
A 35.0- battery with negligible internal resistance, a 50.0- resistor, and a 1.25- inductor with negligible resistance are all connected in series with an open switch. The switch is suddenly closed. How long after closing the switch will the curre
A 300 g block on a 54 -long string swings in a circle on a horizontal, frictionless table at 75. What is the speed of the block? What is the tension in the string?
A man pushes a lawn mower on a level lawn with a force of 200 N. If 42% of the force is directed horizontally, how much work is done by the man in pushing the mower 4.8 m?
A 75.0kg man is riding in a shopping mall. The escalator moves the man at constant velocity from ground level to the floor above, a vertical height of 4.60m. What is the work done on the man by the gravitational force and the escalator?
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