A2.00 kg object is moving in a circular path with a radius of 5.00 cm. the object starts from rest and with constant angular acceleration, obtains an angular velocity of 6.00 rad/s in 3.00 s. the object then comes to a stop with constant deceleration in 4.00 s. the centripetal component of acceleration of the object at 2.00 s is

Space-time metric ds2= -dt2+at2dx2+bt2dy2+ct2dz2 (a)how does the area of a rectangle with vertices at ( x=0, y=0, z=0 ), (1,0,0 ), ( 0,1,0 ) and (1,1,0 ) changes with time? (b) if a photon moving in the x direction starts from the origin at t=1, when does it reach x=l? (ds=0 for the trajectory of a photon.) (c) the proper time for a particle is defined by cd=ds. what is the proper time for a particle to move along the trajectory ( x(t)=t, y(t)=0, z(t)=0 ) from t=0 to 1 ? what is the condition on the parameter a so that the velocity of the particle never exceeds the speed of light ?

Bernie drove home from a vacation in 1.5 hours. he traveled a total distance of 60 miles. what was his average speed in miles per hour? a. 60 mph b. 90 mph c. 40 mph d. 55mph

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec