Acar with a mass of 980 kg is initially traveling east toward an intersection with a speed of vc=22.3m/s and a 1500 kg pickup is traveling north toward the same intersection. the car and truck collide at the intersection and stick together. after the collision the wreckage (car and truck) moves off in a direction of 45.0 degrees above the x-axis. determine the initial speed of the truck (in a/s)

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j