Questions from Modern Physics


Q: You are climbing in the High Sierra when you suddenly find yourself

You are climbing in the High Sierra when you suddenly find yourself at the edge of a fog-shrouded cliff. To find the height of this cliff, you drop a rock from the top; 8.00 s later you hear the sound...

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Q: An object is moving along the x-axis. At t

An object is moving along the x-axis. At t = 0 it has velocity v0x = 20.0 m/s. Starting at time t = 0 it has acceleration ax = -Ct, where C has units of m/s3. (a) What is the value of C if the object...

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Q: A ball is thrown straight up from the ground with speed v0

A ball is thrown straight up from the ground with speed v0. At the same instant, a second ball is dropped from rest from a height H, directly above the point where the first ball was thrown upward. Th...

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Q: Cars A and B travel in a straight line. The distance

Cars A and B travel in a straight line. The distance of A from the starting point is given as a function of time by xA(t)= at + bt2, with a = 2.60 m/s and b = 1.20 m/s2. The distance of B from the sta...

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Q: In your physics lab you release a small glider from rest at

In your physics lab you release a small glider from rest at various points on a long, frictionless air track that is inclined at an angle u above the horizontal. With an electronic photocell, you meas...

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Q: In a physics lab experiment, you release a small steel ball

In a physics lab experiment, you release a small steel ball at various heights above the ground and measure the ball’s speed just before it strikes the ground. You plot your data on a graph that has t...

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Q: A model car starts from rest and travels in a straight line

A model car starts from rest and travels in a straight line. A smartphone mounted on the car has an app that transmits the magnitude of the car’s acceleration (measured by an acceler...

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Q: An airplane is flying with a velocity of 90.0 m

An airplane is flying with a velocity of 90.0 m/s at an angle of 23.0° above the horizontal. When the plane is 114 m directly above a dog that is standing on level ground, a suitcase drops out of the...

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Q: A cannon, located 60.0 m from the base of

A cannon, located 60.0 m from the base of a vertical 25.0-m-tall cliff, shoots a 15-kg shell at 43.0° above the horizontal toward the cliff. (a) What must the minimum muzzle velocity be for the shell...

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Q: You are on the west bank of a river that is flowing

You are on the west bank of a river that is flowing north with a speed of 1.2 m/s. Your swimming speed relative to the water is 1.5 m/s, and the river is 60 m wide. What is your path relative to the e...

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