Recent content by spoonthrower

I know constant speed means there is no acceleration...but I don't see how i can solve anything for this...and does air resistance play a part when he climbs up the hill? help?

so would that mean the skydiver falls with a force of 900 N downward? How do I get his acceleration from that because i don't know his mass. Help?

A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 60.0 kg, and the hill is inclined at 19.0° with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs the same hill at the same constant...

A paraglider is flying horizontally at a constant speed. Assume that only two forces act on it in the vertical direction, its weight and a vertical lift force exerted on its wings by the air. The lift force has a magnitude of 1900 N. For both questions, take the upward direction to be the +y...

A train consists of 50 cars, each of which has a mass of 6.6*10^3 kg. The train has an acceleration of 6.0*10^-2 m/s2. Ignore friction and determine the tension in the coupling at the following places. A)between the 30th and 31st cars B)between the 49th and 50th cars I know f=ma that's...

A golfer rides in a golf cart at a speed of 3.10 m/s for 21.0 s. She then gets out of the cart and starts walking at an average speed of 1.20 m/s. for how long (in sec) must she walk if her average speed for the entire trip, riding and walking, is 1.90 m/s? I know average speed = d/t I'm just...

A golfer rides in a golf cart at a speed of 3.10 m/s for 21.0 s. She then gets out of the cart and starts walking at an average speed of 1.20 m/s. for how long (in sec) must she walk if her average speed for the entire trip, riding and walking, is 1.90 m/s? I know average speed = d/t I'm...

I just want to make sure i got these questions answered correctly about multiple slit diffraction gratings: specifically a grating spectroscope. 1. Why is the 2nd order spectrum more "spread out" than the first order spectrum? Is it because one light wave has to travel 2 wavelengths...

Is the red or violet end of the first order nearest the central maximum? Justify your answer. What would you observe if d were decreased. explain. I have no idea what the central maximum is. what equations do i use? i am so lost. please help me out. thanks.

How far away from a converging lens must an object be ( in terms of focal length, f ) so that the difference between the image distance and the focal lengh is 1% of the focal length? I tried to translate the words into an equation based on the thin lens equation but i don't know if it is...

I am stuck on this problem because it been like 6 yrs since i took geometry and its due by 9 am. please help! Derive the thin lens equation: 1/object distance + 1/ image distance = 1/focal length for a divergent lens, using a diagram of a divergent lens (hint: use similar triangles)...

The drawing shows a rectangular block of glass (n = 1.52) surrounded by liquid carbon disulfide (n = 1.63). A ray of light is incident on the glass at point A with a theta = 23.0° angle of incidence. At what angle of refraction does the ray leave the glass at point B...

A simple pendulum is made from a 0.60 m long string and a small ball attached to its free end. The ball is pulled to one side through a small angle and then released from rest. After the ball is released, how much time elapses before it attains its greatest speed? So would the max speed be...

thanks for your help. i got the right answer.

Since the wire is in a loop i guess i have to use this equation to find the current: B=N(u)I/(2R) where u=4pi*10^-7 and N=# of turns=1 and R=Radius in meters solving for I to get I= 105042.2624 A This is a huge # so i don't know if I am doing this right. Power=I^2R where I is the...