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The speed of a bobsled is increasing because it has an accelerationof 2.4m/s^2. At a given instant in time, the forces resistingthe motion, including kinetic friction and air resistance, total450 N. The mass of the bobsled and its riders is 270kg. What is the magnitude of the net force that acts on the bobsled?
a. 200 Nb. 650 Nc. 1100 Nd. 450 Ne. 980 N
In a 2.0- intense cycling race, a cyclist can loses 3.9 of water through perspiration. Estimate how much heat the cyclist loses in the process
The position of a cart that is oscillating on a spring is given by the equation x= 12.3 cm cos [(1.26 s-1)t] . When t= .805s , what are the (a) velocity and (b) acceleration of the cart ?
An object is placed to the left of a convex lens and on the optical axis. evaluate the magnification of the image formed by the lens
What is the height h of the CM of the can and contents (d) If x is the height of the remaining soda at any given instant, find out x when com reaches its lowest point.
Unless otherwise stated, all objects are located near the Earth's surface, where = 9.8. Calculate the upward force on the puck in both situations
A ballplayer standing at home plate hits a baseball that iscaught by another player at the same height above the ground fromwhich it was hit. How high will the ball rise
A farsighted woman breaks her current eyeglasses and is usingan old pair whose refractive power is 1.720 diopters. How far is hernear point from her eyes
A person weighs 691 N in air but only 499 N when standing in water up to the hips. Find the volume of each of the person's legs
A car takes 11 s to go from v = 0 to v = 75 m/s at approximately constant acceleration. If you wish to find the distance travelled using equation d = 1/2 at2, what value should you use for a.
Explain how you might use the concept of beat frequency to tune a musical instrument using tuning forks. Would this method work better for an instrument that is slightly out of tune or an instrument that is completely out of tune?
The inlet ducting to a jet engine forms a diffuser that steadily decelerates the entering air to zero velocity relative to the engine before the air enters the compressor. determine the temperature, in degrees Celsius, of the air entering the compr..
monochromatic light(wavelength= 500 nm) passes through two splits and onto a screen 2.5 m away. what is the new distance between bight fringes
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