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Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6.38 x 103 km. Show why this objection is wrong by calculating
1. The weight of the person.
2. The speed of a 97-kg person at the equator.
3. The force needed to accelerate the person in the circle.
4. The normal force of Earth on the person, that is, the person’s apparent weight.
A 0.25 kg disk shaped machine part with a radius of8.0 cm rotates eccentrically (off center) about an axis thatis normal to its flat surface, How much greater is this torque than the torque required to rotate the part with the same angular acceler..
Two figure skaters, one weighing 625N and the other 775N , push off against each other on very smooth ice. If the heavier skater travels at 1.60m/s , how fast will the lighter one travel?
A roller coaster moves 200 feet horizontally, then raises 135 feet at an angle of 30.0 degree above the horizontal. Use graphical techniques to calculate the roller coasters displacement from its starting point at the end of this movement
In one dimension, an inertial ball of mass 1 kg has a speed of 1.50 m/s to the right and another inertial ball of mass 3 kg has a speed of 2.00 m/s to the left. Find the velocity of the center of mass after the collision
A physics student is standing on an initially motionless,frictionless turntable with rotational inertia 0.31kg·m2. He's holding a wheel of rotational inertia0.22 kg·m2 spining at 122 rpm about a verticalaxis, as we showed in Fig. 11.8.
a 0.5 kg block of aluminum is heated to 200 degrees C. The block is then quickly placed in an air insulated tub of cold water at 0 degrees C and sealed. compute the final temperature of the water and block
question the speed of light in a material is 0.77timesc. what is the critical angle in degrees of a light ray at the
A bunch of grapes is placed in a spring scale at a supermarket. What is the mass of the grapes
1200 KVA TRANSFORMER CHANGES TEH INCOMING VOLTAGE FROM 1200 VOLTS TO 400 VOLTS. WHAT IS THE INCOMING CURRENT
A beam of light is incident in air with an incident angle 56 degrees. calculate the index of refraction of this unknown liquid
Light of wavelength 619 nm is incident normally on a diffraction grating. Two adjacent maxima occur at angles given by sin ? = 0.20 and sin ? = 0.32. The fourth-order maxima are missing, What is the separation between adjacent slits
the rubber worn from tires mostly enters the atmosphere as particulate pollution. estimate how much rubber in kg is put
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