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After a 0.250-kg rubber ball is dropped from a height of 1.80 m, it bounces off a concrete floor and rebounds to a height of 1.20 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. magnitude? direction? (b) Estimate the time the ball is in contact with the floor to be 0.08 seconds. Calculate the average force the floor exerts on the ball. magnitude? direction ?
On a safari, you are spearfishing while wading in a river. You observe a fish gliding by you. If your line of sight to the fish is 64.0° below the horizontal in air, and suppose the spear follows a straight-line path through the air and water afte..
What is the magnitude of the acceleration of a modified At wood machine if the mass of the cart is 3 kg and the hanging mass is 4 kg
a boy hears an eco of his own voice from a distant hill after 1s. The speed of the sound is 340m/s. What is the distance of the hill from the boy
A traveler first drives 19.4 km east, then 29.7 km southeast, and finally 9.9 km south. Find the traveler's total displacement
In April 1974, Steve Prefontaine completed a 10000m race in a time of 1663.6 s. Suppose \"Pre\" was at the 8550m mark at a time of 1500 s. calculate the acceleration that he had
a large rectangular tub is filled to a depth of 2.60 m with olive oil, which has density 915 kg/m^3. find the force of air pressure on the surface of the oil
An ice skater slides at a speed of 25 km/h on a level ice track. At this point she allows herself to coast to a complete stop
If the electric field strength in air exceeds 3.0 multiplied by 106 N/C, the air becomes a conductor. Using this fact, determine the maximum amount of charge that can be carried by a metal sphere 3.1 m in radius.
What is the least time necessary for crossing
How much horizontal force should a sprinter of mass 57.0 exert on the starting blocks to produce this acceleration.
Each of the sources in the drawing emits a frequency of 4.57 multiplied by 1014 Hz, and the speed v is 2.50 106 m/s. Calculate the observed frequency fo in situation A. fo =? Unit
A machine shop has 100 equally noisy machines that together produce an intensity level of 90 dB. how many machines must be turned off
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