Mechanics | Relativity Answers

If Photon Energy is 6.6 x10^20 J, what is true about EM radiation? (useful quantities: h=6.6 X 10^-34 J s , and c=3.0 X 10^8 m/s

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A thin rod length 2l and mass M is located above the flat surface slippery. a small ball mass m and velocity v0 pounding the rod tip .Assume that the colission is elastic and the speed of the ball after a collision parallel with the initial speed .

A) Calculate the ratio of M / m so that the ball is at rest after the collision
B) Calculate the minimum time that required of the rod to perform one round
C) Calculate the speed of the ball if there is a shaft at the lower end of the rod

A particles of mass m = 5 units is moving with a uniform speed v = 3 * root 2 present in the XOY plane along the line Y = X + 4. What is the magnitude of the angular momentum of the particle about the origin?

A man with a motorcycle driving on a straight road with a speed of 90 km / h . The mass of men along the bike of 100 kg .The officers chasing criminals from behind men using a helicopter , flying at an altitude of 500 m above the ground and at a speed of 144 km / h . The officer dropped the body of mass 400 kg ( without giving the initial speed of the helicopter ) . It turns out objects just overwrite the officer released the man .

In a system that consists of men along with the bike and the object is released attendant , find the acceleration of the center of mass and center of mass equation of motion

The velocity of a body at a given instant t is given by v = 3i + (4 – 2t)j (See lesson 4)
(i) What is the magnitude and direction of the initial velocity of the body?
(ii) At what instant will the body hit the x-axis again?
(iii) What is the shape of the trajectory? why?
(iv) What is the maximum distance moved by the body along the y-axis?

If a person hangs from two strands of rope that form equal angles to the vertical, how could the tension in each rope possibly be more than the person's weight?

The velocity of a body at a given instant is given by V= 3i+(4-2t)k
(A)-what is the magnitude and direction ofvthe initial velocity of the body
(B)- at what instant the body will hit x axis again
(C)-what is the shape of trajectory and why?
(D)- what is maximum distance covered in y axis

A football placekicker consistently kicks a football with a resultant velocity of 23
m/s at an angle of 43º relative to the horizontal. What is the maximum distance
from the goal post the kicker can make a field goal? Assume the bottom bar of the
goal post is 10 feet (3.05 m) off of the ground.

The distance from the pitcher's mound to hoe plate is 60 feet 6 inches (18.44 m). The fastest recorded pitch is 104.8 mph. If the pitch was thrown with a release angle of 0 degree relative to the horizontal, what's the vertical displacement of the ball between ball release on the mound and home plate? Assume the ball is released 18.44 m from home plate

a bike accelerates uniformly from rest to a speed of 7.10 m/s over a distance of 35.4 m. determine the acceleration of the bike.