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The dimensions of the club-ax are shown in Figure 8-47. How far is the center of mass from the handle end of the club-ax?
If air resistance and rolling resistance can be modeled as a constant frictional force of 41.0 N, find the work he did in pushing forward on his wheels during the downhill ride.
What is his average acceleration aavg in the interval 2.00 min to 7.80 min?
Find the average forces exerted on (a) the car that hits a line of water barrels and takes 1.8 {rm s} to stop, and (b) the car that hits a concrete barrier and takes 0.2 {rm s} to stop.
A cue ball traveling at 7.0 m/s makes a glancing, elastic collision with a target ball of equal mass that is initially at rest. The cue ball is deflected so that it makes an angle of 30° with i
A 55.0 kg girl weighs herself by standing on a scale in an elevator. a) What is the force exerted by the scale when the elevator is descending at a constant speed of 10 m/s?
What speed do they measure? Express your answer as a multiple of c. Hint: you should not have to do any calculations.
On a sheet of graph paper, draw the two complex numbers A = 2 + i and B = 1 + 2i. Draw the complex number C = A + B and verify that it corresponds to the usual "tip-to-tail" or "parallelogram" meth
If it takes 4.00 J of work to stretch a Hooke's-law spring 10.0 cm from its unstressed length, determine the extra work required to stretch it an additional 10.0 cm.
what is the net force that acts on the plane's 78 kilo pilot? And if the plane could fly without this pilot, how much force would the plane need to maintain the same acceleration?
A baseball is hit with a speed of 30.0 ms-1 at an angle of 50.0 degrees. It land`s on the flat roof of a nearby building with a height of 13m. If the ball was hit when it was 1.5 m above the ground
A boat crosses a river of width 130 m in which the current has a uniform speed of 1.57 m/s The pilot maintains a bearing perpendicular to the river and a throttle setting to give a constant speed o
A simple pendulum in a science museum entry hall is 3.51 m long, has a 1.25 kg bob at its lower end, and swings with an amplitude of 10.5 degrees. How much time does the pendulum take to swing from
Broadcasts their well wishes on the Family Radio System frequency of 462.5625 Mhz. To what frequency must the homesick captain tune the ship's radio to receive the broadcast?
The roller-coaster car shown in Fig. 6-41 (h1 = 40 m, h2 = 12 m, h3 = 23 m), is dragged up to point 1 where it is released from rest. Assuming no friction, calculate the speed at points 2, 3, and 4
What was the magnitude of the average acceleration of the driver during the collision? Express the answer in terms of "g's," where 1.00 {g} = 9.80 {rm m/s^{2}}.
The owner of the statue claims it is made of solid gold. When the statue is completely submerged in a container brimful of water, the weight of the water that spills over the top and into a bucket i
A dockworker loading crates on a ship finds that a 25 kg crate, initially at rest on a horizontal surface, requires a 78 N horizontal force to set it in motion. However, after the crate is in motio
A 5.00-g bullet is shot through a 0.97-kg wood block suspended on a string 2.00 m long. The center of mass of the block rises a distance of 0.43 cm. Find the speed of the bullet as it emerges from
While John is traveling along an interstate highway, he notices a 153 mi marker as he passes through town. Later John passes a 109 mi marker. What is the distance between town and John's current lo
What is the terminal speed for an 85.0 kg skier going down a 41.0 degree snow-covered slope on wooden skis mu_k= 0.060? The skier is 1.8 m tall and 0.3 m wide.
An artillery shell is fired with an initial velocity of 300 m/s at 63.0° above the horizontal. To clear an avalanche, it explodes on a mountainside 34.0 s after firing. What are the x and y com
Next, a beaker of water is placed so that the iron block, suspended as above, is submerged in the beaker but not touching the bottom (see the figure). What mass (in kg) is now necessary to balance
The front 1.20 m of a 1350 kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision.