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A boy catches - with bare hands and his arm extended - a 0.16 kg baseball coming directly toward him ar a speed of 25 m/s.
a) what is the magnitude of the impulse he feels assuming a stop time of 3.5 ms?
b) what is the average force the boy's hand feel while catching the ball?
A 1.83-kg solid sphere (radius = 0.141 m) is released from rest at the top of a ramp and allowed to roll without slipping. What is its rotational kinetic energy
When your friend is riding a 6.50-kg bicycle, the weight is supported more on the back tire and less on the front tire. what is your friend's weight
How much time has elapsed between the two measurements.
A 6.0-cm-diameter circle lies in the xz-plane in a region where the electric field is E =(1200i^+1200j^+1200k^)N/C
It takes only 9.12N of force to hold up a 1KG metal crown in water, Compute the specific gravity of this metal, and guess what element it might be using a density table
A ball of mass m=0.5 kg and radius r=0.02m is pushed against a spring of force constant 200N/m, What is the speed of the rolling ball when it leaves the spring
Two coins, carrying identical charges, lie 1.5 m apart on a table and a coin experiences a force of 2.0 N, How large is the charge on each
You are 1.5 m tall and you are standing 2.0 m away from a flat mirror. The Top of the mirror is at the same level as the top of your head. How large is the mirror
The work done in accelerating a flywheel from rest to an angular speed of 14.8 revolutions per second is 12.4 kJ. What is the moment of inertia of the flywheel
A Charge of Q=700nC is uniformly distributed throughout a circular disk of radius R =10 cm, What are the magnitued and direction of the electric and magnetic field at the center of the rotating charge
strikes the wooden block of a ballistic pendulum, as shown. The block has a mass of 270 g. Find out the speed of the bullet/block combination immediately after the collision.
What is the attractive force between the protons. A rocket rises vertically, from rest, with the acceleration of 3.0 m/s2 until it runs out of fuel at an altitude of 1100 m. After this point, its acceleration is that of gravity, downward.
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