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A skateboarder (whose mass is 57kg) is moving at 3.7m/s at thetop of a 5.1m ramp. Without pushing on the ground, she rolls downto the bottom of the ramp and up the next ramp which is 2.4m tall.There is an effective friction force equal to her weight andit is 3.1m from crest to crest along the surface of theramps.
(1) what speed will she be going when she crests the secondramp?(2) How high would the second ramp have to be in order for herto stall exactly on top of the ramp?A block of mass 5.1kg has a velocity of 4.5m/s at a distance0.47m before it hits a spring at its equilibrium length with aspring constant of 482 N/m.(3) Assuming no friction, how far does the springcompress?(4) If the surface has a coefficient of friction ofμ=0.15, how far does the spring compress?
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1360 Hz. What is the speed of the bird
A rotating wheel requires 8.00 s to rotate 28.0 revolutions. calculate the constant angular acceleration of the wheel
A copper wire, 1 m long, has a density of 0.020 g/cm and vibrates in 4 segments when under tension produced by a 250 g hanging mass
Compute the Force of Friction (Ff) for a 5kg aluminium block being pulled with constant velocity (uniform motion), up the steel plank that is at a 30degrees angle to the horizontal.
An AC source operating at 60 Hz with a maximum voltage of169 V is connected in series with aresistor (R = 1.4 k) and acapacitor (C = 2.5 µF). What is the maximum value of the current in the circuit? What are the maximum values of the potential diff..
A 2 kg mass is held at rest on top of a frictionless and horizontal table. find the tension of the string which supports the hanging mass
A 1.65 nC charge with a mass of 1.5 x 10-15 kg experiences an acceleration of 6.33 x 107 m/s2 in an electric field. What is the magnitude of the electric field
A rock is thrown vertically upward with a speed of 17.0 m/s from the roof of a building that is 70.0 m above the ground. Assume free fall. A) In how many seconds after being thrown does the rock strike the ground? B) What is the speed of the rock ..
A silver rod and a common glass rod both have the same length when at 20.0°C. The silver rod is heated to 52.3°C. To what temperature must the glass rod be heated so that they are again at the same length?
An ambulance is generating a siren sound at a frequency of 2,400 Hz. The velocity of sound is 340.0 m/s. The observer is traveling at a velocity of 24.00 m/s toward the ambulance and the ambulance is traveling at a velocity of 24.00 m/s toward the ob..
A block of weight w = 35.0N sits on a frictionless inclined plane, which makes an angle θ = 29.0° with respect to the horizontal, as shown in the figure. (Figure 1) A force of magnitude F = 17.0N , applied parallel to the incline, is just suff..
A mass on a string of unknown length oscillates as a pendulum with a period of 6 s. What is the period in the following situations, determine The mass is doubled
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