Measurements of the sun distance
Why did Aristarchus make his measurements of the sun's distance at the time of a half moon?
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In coming to a stop, a car leaves skid marks 93 m long on the highway. Assuming a deceleration of 6.00 m/s2, estimate the speed of the car just before braking.
A 0.39-kg pendulum bob is attached to a string 1.2 m long. What is the change in the gravitational potential energy of the system as the bob swings from point A to point B in the figure, where θ = 33°?
The ball then slides along the table and makes an elastic headon collision with a second ball of equal mass that is initially at rest. Find the velocity of the second ball just after it is struck.
The coefficients of static and kinetic frictions for plastic on wood are 0.50 and 0.40, respectively. How much horizontal force would you need to apply to a 3.0 N plastic calculator to start it moving from rest?
Has the capacitance increased, decreased, or stayed the same? (b) Is there more, less, or the same amount of charge on the capacitor?
Which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of the pendulum's displacement.
A uniform disk turns at 4.3 around a frictionless spindle. A nonrotating rod, of the same mass as the disk and length equal to the disk's diameter, is dropped onto the freely spinning disk . They then both turn around the spindle with their cente
What is the kinetic energy of this bar? (Hint: Different points in the bar have different speeds. Break the bar up into infinitesimal segments of mass dm and integrate to add up the kinetic energy of all these segments.)
A 3.00 kg rocket is fired which aquires a speed of 50 m/s after traveling down a 90cm launching tube. Assuming it accelerated uniformly what force acted on it?
Starting at a point 5 cm to the left of the sheet , you travel through the sheet to a final resting 14 cm to the right of the sheet. what is the change in potential (size and sign) in doing this? Draw the situation.
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