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An archer shoots an arrow horizontally at a target 15 m away. The arrow is aimed directly at the center of the target, but it hits 60 cm lower. What was the initial speed of the arrow? (Neglect air
A convex lens is held over a piece of paper outdoors on a sunny day. When the paper is held 20 cm below the lens, the sunlight is focused on the paper and the paper ignites. What is the focal lengt
A man pulls a crate of mass 71.0 kg across a level floor. He pulls with a force of 178.0 N at an angle of 27.0° above the horizontal. When the crate is moving, the frictional force between the f
A 12.4 g bullet is fired horizontally into a 96 g wooden block initially at rest on a horizontal surface. After impact, the block slides 7.5 m before coming to rest. If the coefficient of kinetic f
A rocket is launched at an angle of 50.0° above the horizontal with an initial speed of 105 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 31.0 m/s2.
A clock pendulum oscillates at a frequency of 2.5 Hz. At it is released from rest starting at an angle of 15º to the vertical. Ignoring friction, what will be the position (angle) of the pendul
Bonnie and Clyde are sliding 300 {rm kg} bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 420 {rm N} of force while Bonnie pull
An archer pulls her bowstring back 0.400 m by exerting a force that increases uniformly from zero to 200 N. a) What is the equivalent spring constant of the bow?
Find the angle of the slope that a person will slide down at a constant speed once he has started moving if the coefficient of sliding friction is .425
What is the time necessary for crossing if the hunter wishes to move neither upstream nor downstream whilst crossing the river? Draw the vectors to scale on a graph to determine the answer.
A shopper walks from the door of the mall to her car 250 m down the line of cars, then turns 90 degrees to the right and walks an additional 60 meters. What is the magnitude of the displacement of
A car drives north at 46mi/h for 10min and then turns east and goes 5.0mi at 56mi/h . Finally, it goes southwest at 30mi/h for 6.0min. What's the car's displacement?
An astronaut who was outside repairing his spaceship with a wrench lost his tie rope. Now he is stranded in space. Unfortunately, you can't swim in space. How can the law of conservation of mome
In the figure below (part a), two blocks are connected by a lightweight, flexible cord which passes over a frictionless pulley. (a) If m1 = 2.8 kg and m2 = 5.2 kg, what is the acceleration of the t
If a third charge, of 5.00 , is now placed at the point = 3.00 , = 4.00 find the and components of the total force exerted on this charge by the other two charges.
A dog searching for a bone walks 3.00 m south, then 8.20 m at an angle 30.0° north of east, and finally 14.0 m west. Find the dog's resultant displacement vector using graphical techniques.
In a car lift the output plunger has a radius of 9 cm. The weight of the plunger and the car is 21,600N. What is the gauge pressure of the hydraulic oil used in the operating the lift?
The wind exerts a force of 153 N North on a sailboat, while the water exerts a force of 81 N West on the sailboat. What is the magnitude of the net external force on the sailboat?
What is the angular velocity in rad/s? What is the angular displacement of the propeller in 1.50 s?
Argon is a monatomic gas whose atomic mass is 39.9 u. The temperature of 9 grams of argon is raised by 75 K under conditions of constant pressure. Assuming that argon is an ideal gas, how much heat
A 8.00 m x 11.0 m swimming pool slopes linearly from a 1.00 m depth at one end to a 3.80 m depth at the other. What is the mass of the water?
What is the magnitude of the force on the 1.0 charge in the middle of the figure due to the four other charges?
A jogger runs 100 m due west, then changes direction for the second leg of the run. At the end of the run, she is 175 m away from the starting point at an angle of 15.0° north of west. What were
A 1.0kg stone is being whirled at constant speed of 12 m/s in a circle, held on a frictionless horizontal surface by a steel wire which is horizontal. The wire is 4.0m long and its radius is 1.0mm.