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After class one day, two physics learners get into an argument about rotational dynamics. Jack thinks the nickel in his pocket would beat Jill's silver ring in a race down an incline, but Jill is convinced her ring would win. To settle their argument, Jack and Jill climb up a 20 meter hill inclined at 30o to the horizontal. Both objects are released from rest at the top of the hill and roll without slipping all the way to the bottom. Obtain the translational speed of each object when it reaches the bottom? Find how long does each object take to get from the release point to the bottom of the hill?
Suppose a friend asks to examine the 10.0 kg box you were Given, hoping to guess what is inside; and you respond, Calculate the magnitude of the upward force FN exerted by the table on the box
To determine the specific heat of an object, a student heats it to 100 in boiling water. She then places the 68.5 object in a 196 aluminum calorimeter containing 135 of water. The aluminum and water are initially at a temperature of 19.5, and are ..
The linear impulse delivered by the hit of a boxer is 248 N • s during the 0.373 s of contact. What is the magnitude of the average force exerted on the glove by the other boxer? React in units of N
A metal disk rotates on an axis through its center (I = 0.2 kg·m2) with angular velocity -3.3 radians/s, What is the resulting angular acceleration of the disk
a spider crawling across a table leaps onto a magazine blocking its path. the initial velocity of the spider is 0.860
A circular rod of length 25cm and diameter 8mm is made of 1045grade steel. (a) calculate the stress and strain in the rod, andits extension, when it is subjected to 5kN of tension. (b) Atwhat force would the rod begin to yield? (c) by what amount ..
As an eager scientist on a hot summer day you wish to determine how much ice to buy to add to your cooler which is filled with 32 cans of soda which are warm at 87.7°F. how much ice needs to be added to your cooler
It's possible to estimate the percentage of fat in the body by measuring the resistance of the upper leg rather than the upper arm; the calculation is similar. What are the fractions of muscle and fat in the leg
A parallel-plate capacitor in air has circular plates of radius 3.8 cm separated by 1.1 mm. Find the time rate of change of the electric field between the plates
A 4.3-kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 2.9 m/s2, find the force exerted by the rope on the bucket
A proton is confined to a nucleus that has a diameter of 5.7 10-15 m. what is the minimum uncertainty in its momentum
An automobile tire is rated to last for 35,000 miles. To an order of magnitude, through how many revolutions will it turn
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