If there is 800 kg truck going 35 m/s down the highway and the trucker's brakes apply 1000N to stop the truck in 28 seconds. Which two of the following is needed to find the momentum
of the truck? * 1
(13 Points)
35 m/s and 1000 N
800 kg and 35 m/s
800 kg and 1000 N
800 kg and 28 seconds

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?