Consider a particle moving along the x-axis whose velocity as a function of time is dx dt g 1+02t2 (1) where g is a constant. (a) calculate the components of the particle's 4-velocity. (b) express x and t as functions of the proper time t along the trajectory. (c) what are the components of the 4-force and the 3-force acting on the particle?

Aman does 500 j of work pushing a car a distance of 2 m. how much force does he apply? assume there is no friction. a. 250 n b. 1000 n c. 125 n d. 500 n

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

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.