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A ball rolling down an incline travels 6 cm in the first .25 seconds, and 24 cm in the first .50 seconds. Find:
a) the average speed for the first quarter second of time interval
b) the average speed for the second quarter second time interval
c) find its acceleration
A rocket rises vertically, from rest, with an acceleration of 4.0m/s2 until it runs out of fuel at an altitude of 1400m. After this point, What maximum altitude does the rocket reach
An airplane is flying in a horizontal circle at a speed of 520 km/h. If the wings of the plane are tilted 34° to the horizontal, what is the radius of the circle (in m) in which the plane is flying? Assume that the required force is provided entir..
A child is pushing a merry-go-round. The angle through which the merry-go-round has turned varies with time according to ?(t)=?t+?t3, What is the initial value of the angular velocity
A 74 trampoline artist jumps vertically upward from the top of a platform with a speed of 5.0 m/s. How can I find how much he depresses it if there is a spring constant of 6.2*10^4.
When a 58 g tennis ball is served it accelerates from rest to a constant speed of 42 m/s the impact with the racket gives the ball a constant acceleration over a distance of 37 cm illustrate what is the magnitude of the net force acting on the ball..
Two small nonconducting spheres have a total charge of 90.7?C. When placed 1.06 m apart, the force each exerts on the other is 10.6 N, What is the smaller charge on the sphere
The magnitude of the air resistance that opposes its downward motion is 258 N. Explain what is the magnitude of the acceleration of the rock?
determine the value of IG. The support at B does not move while the measurement is taken. For the calculation, the horizontal location of G should be determined.
In an L-R-C series circuit, the resistance is 420 ohms, the inductance is 0.340 henrys, and the capacitance is 1.80×10?2 microfarads. What is the resonance angular frequency of the circuit
A concave mirror is of hemisphjerical shape with radius 40cm. A thin layer of unknown transparent liquid is poured into mirror. The mirror liquid forms a real image and another real image is formed by the mirror alone.
a 10,000kg open rail car rolls under a hopper at 1m/s. the hopper dispenses grain into the moving rail car, how much grain was loaded into the car
A spacecraft is in orbit around a planet. The radius of the orbit is 2.9 times the radius of the planet (which is R = 71451 km), What is the period of the spacecraft's orbit
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