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1. A grindstone of radius 4.0 m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to12 rad/s over the next 4.0 seconds. Suppose that the angular acceleration is constant. during how many revolutions does the grindstone turn through the 4.0-second interval?
2. A wheel of radius 0.5 m rotates with a constant angular speed about an axis perpendicular to its center. A point on the wheel that is 0.2 m from the center has a tangential speed of 2 m/s. Decide the tangential speed of a point 0.3 m from the center of the wheel.
3. On an amusement park ride, passengers are seated in a horizontal circle of radius 7.5 m. The seats begin from rest and are uniformly accelerated for 21 seconds to a maximum rotational speed of 1.4 rad/s. What is the tangential acceleration of the passengers through the first 21 s of the ride?
Choose one part of the photo-electric experiment that cannot be explained by assuming that light is a wave. Why do we need the concept of light as a particle?
The 2.0 m stick weighs 6.0 N and is suspended by support cords ateach end. Calculate the support force at the right end of the board
A 66kg rock climber is climbing a so called chimney between two rock slabs, What is her push against the rock
Three charges, +2.6 \mu C, -4.9 \mu C, and-7.2 \mu C, are located at (-0.21 m,0.12 m), (0.52 m, -0.35 m), and (-0.46 m,-0.34 m) respectively. What is the electric field at theorigin? Enter the x and ycomponents of the field separated by a comma.
A stick is resting on a concrete step with 2/5 of its length hanging over the edge. A single ladybug lands on the end of the stick hanging over the edge, and the stick begins to tip. obtain the magnitude of the angular acceleration of the stick
A radio controlled car increases its kinetic energy from 4J to 12J over the distance of 2 m. What was the average net force on the car during this interval.
A double convex lens (convex on both sides) is made of glass with an index of refraction of 1.60. What is the magnitude of the larger radius
Listed below are the forces that were applied to the cart in these three runs. Run Force (N) Run = 1(diamonds), Use Newton's second law to estimate the mass of the cart in kg from this set of data
q1. the loaded cab of an elevator has a mass of 3.0 x 103 kg and moves 221 m up the shaft in 23 s at constant speed. at
A golfer imparts a speed of 29.6 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation.
a explain the function of the activator added in trace quantities to many inorganic scintillators. why are activators
A capacitor is used as energy storge device. the material between the plates of the capacitor has a certain resistance leading to a gradual slef-discharge. What is the fraction of the initial energy lost in the first hour
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