Questions from Modern Physics

Q: A stone is thrown into the air at an angle above the

A stone is thrown into the air at an angle above the horizontal and feels negligible air resistance. Which graph in Fig. Q3.16 best depicts the stone’s speed v as a function of time...

Q: Suppose that the boy in Problem 3.60 throws the ball

Suppose that the boy in Problem 3.60 throws the ball upward at 60.0° above the horizontal, but all else is the same. Repeat parts (a) and (b) of that problem. Data from Problem 3.60: A boy 12.0 m ab...

Q: A rock is thrown with a velocity v0, at an angle

A rock is thrown with a velocity v0, at an angle of a0 from the horizontal, from the roof of a building of height h. Ignore air resistance. Calculate the speed of the rock just before it strikes the g...

Q: A physics professor did daredevil stunts in his spare time. His

A physics professor did daredevil stunts in his spare time. His last stunt was an attempt to jump across a river on a motorcycle (Fig. P3.63). The takeoff ramp was inclined at 53.0°, the ri...

Q: A 2.7-kg ball is thrown upward with an

A 2.7-kg ball is thrown upward with an initial speed of 20.0 m>s from the edge of a 45.0-m-high cliff. At the instant the ball is thrown, a woman starts running away from the base of the cliff with a...

Q: A 2.7-kg ball is thrown upward with an

A 2.7-kg ball is thrown upward with an initial speed of 20.0 m>s from the edge of a 45.0-m-high cliff. At the instant the ball is thrown, a woman starts running away from the base of the cliff with a...

Q: A 76.0-kg rock is rolling horizontally at the

A 76.0-kg rock is rolling horizontally at the top of a vertical cliff that is 20 m above the surface of a lake (Fig. P3.65). The top of the vertical face of a dam is located 100 m from the foot of the...

Q: Henrietta is jogging on the sidewalk at 3.05 m/

Henrietta is jogging on the sidewalk at 3.05 m/s on the way to her physics class. Bruce realizes that she forgot her bag of bagels, so he runs to the window, which is 38.0 m above the street level and...

Q: A cart carrying a vertical missile launcher moves horizontally at a constant

A cart carrying a vertical missile launcher moves horizontally at a constant velocity of 30.0 m/s to the right. It launches a rocket vertically upward. The missile has an initial vertical velocity of...

Q: A firefighting crew uses a water cannon that shoots water at 25

A firefighting crew uses a water cannon that shoots water at 25.0 m/s at a fixed angle of 53.0° above the horizontal. The firefighters want to direct the water at a blaze that is 10.0 m above ground l...