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Huck Finn walks at a speed of 0.70 across his raft (that is, he walks perpendicular to the raft's motion relative to the shore). The raft is traveling down the Mississippi River at a speed of 1.50 relative to the river bank.
a) What is Huck's speed relative to the river bank?b) What is Huck's speed direction to the river bank?
A 2.0 kg mass is connected to a spring with a spring constant of 9.0 N/m. What is the period of this simple harmonic motion
A 1.4Kg block and a 2.6kg block are attached to opposite ends of a light rope. what is the acceleration of the lighter block
An object fired at an angle of 19.1° above the horizontal takes 2.61 s to travel the last 15.3 m of its vertical distance and the last 10.3 m of its horizontal distance. With what speed was the object launched
A cooling fan is turned off when it is running at 880rev/min . It turns 1000 revolutions before it comes to a stop. What was the fan's angular acceleration, assumed constant
A yo-yo has a rotational inertia of 970 g·cm2 and a mass of 104 g. Its axle radius is 3.15 mm, What is the magnitude of its linear acceleration
I want to put a coating on a glass surface to minimize the reflection of He-Ne laser light (632.8nm wavelength). What is the minimum coating thickness required
An Elevator descended from rest on the 10th floor passing the 4th floor for a total distance of 22.5m. what was the velocity of the elevator as it passed the 4th floor
A projectile is fired straight upward from the Earth's surface at the South Pole with an initial speed equal to one third the escape speed. What is the altitude of the projectile at this instant
A grindstone of radius 4.0 m is initially spinning with an angular speed of 8.0 rad/s. What is the average angular speed of the Grindstone
Two speakers face each other and radiate coherently and in phase. How many loud maximum intensity positions are there between the speakers
Estimate how many times planet has orbited its star
To start her lawn mower, Julie pulls on a cord that is wrapped around a pulley. The pulley has a moment of inertia about its central axis of I=0.570 kg(m2), How much tension must the rope exert
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