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A car is driven east for a distance of 47 km, then north for 27 km, and then in a direction 29° east of north for 29 km. Determine (a) the magnitude (in km) of the car's total displacement from
How many (whole number of) 80 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton?
A 3.13 kg block is placed on top of a 8.68 kg block. A horizontal force of F = 67.8 N is applied to the 8.68 kg block, and the 3.13 kg block is tied to the wall. The coefficient of kinetic friction
A sailor strikes the side of his ship just below the surface of the sea. He hears the echo of the wave reflected from the ocean floor directly below 9.0 s later. How deep is the ocean at this point
What is the net amount of heat this person could radiate per second into a room at 19.0^circ C (about 66.2^circ F) if his skin's surface temperature is 31.0^circ C? (At such temperatures, nearly all
When you lift a bowling ball with a force of 91 N, the ball accelerates upward with an acceleration a. If you lift with a force of 102 N, the ball's acceleration is 2a. Find the weight of the bowlin
In the redesign of a machine, a metal cubical part has each of its dimensions tripled. By what factor do its surface area change?
What is the speed of an electron that has been accelerated from rest through a potential difference of 1050 ?
A tank with vertical walls, 2m wide and 2m long and 2.5m high, is filled with 4800 litres of water (density 1000 kg/m3) and 3200 litres of light oil (density 900 kg/m3). Calculate the magnitude and
A plate of glass with parallel faces having a refractive index of 1.52 is resting on the surface of water in a tank. A ray of light coming from above in air makes an angle of incidence 34.5 with th
Sally applies a horizontal force of 462 N with a rope to drag a wooden crate across a floor with a constant speed. The rope tied to the crate is pulled at an angle of 56 degrees. How much force is
If the ball is in contact with the wall for 5.00 ms, what is the magnitude of the average acceleration of the ball during this time interval?
A bird that can fly 60 km/h flies off the front of one train when they are 70 km apart and heads directly for the other train. On reaching the other train it flies directly back to the first train,
How long does it take the boat to complete a trip consisting of a 283 m displacement down-stream followed by a 257 m displacement up-stream?
The cliff is 31.9 m above the ocean. The acceleration of gravity is 9.8 m/s2 . Find the car's position relative to the base of the cliff when the car lands in the ocean. Answer in units of m.
A 0.477 kg ice puck, moving east with a speed of 3.06 m/s, has a head-on collision with a 0.981 kg puck initially at rest. Assuming a perfectly elastic collision, what will be the speed and directi
A rock concert is being held in an open field. Two loudspeakers are separated by 5.00 m. As an aid in arranging the seating, a test is conducted in which both speakers vibrate in phase and produce a
A motorcycle rider starts from rest and goes 3.75 rad counterclockwise around a circular track in 12.3 seconds. Assuming she accelerates at a constant rate, what is her angular acceleration?
A 15 g rifle bullet traveling 240 m/s buries itself in a 4.0 kg pendulum hanging on a 2.5 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal compo
A ranger in a national park is driving at 51 km/h when a deer jumps onto the road 57 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of
How far does the cab move while accelerating to full speed from rest? (b) How long does it take to make the nonstop 216 m run, starting and ending at rest?
You illuminate two slits 0.50 mm apart with light of wavelength 555 nm and observe interference fringes on a screen 6.0 m away. What is the spacing between the fringes on the screen?
Suppose the thickness of the membrane is quadrupled, but the resistivity and potential difference remain the same. How much current flows through the same area of membrane now?
What is the magnitude of the chicken's acceleration? What is and direction of the chicken's acceleration? How far did the chicken slide?
Find the required angular speed,w , of an ultracentrifuge for the radial acceleration of a point 2.80 cm from the axis to equal 600000 g (where is the acceleration due to gravity).