1.imagine you were able to throw a ball in a frictionless environment such as outer space. once you let go of the ball, what will happen to the ball according to the law of inertia?
a. it will travel in a straight forever line
b. it will travel striaight line but eventually slow down
c. it will continue to speed up forever
d. it will slow down and turn
2.a car accelerates down the road .what is the reaction to the tires pushing on the road?
a. the car in the tires moving the car
b. the masses of the car pushing on the tires
c. the road pushing on the tires
d. the road moving away from the tires

The extremely high temperatures needed to trigger nuclear fusion are proposed to be generated by laser irradiating a spherical pellet of deuterium and tritium fuel of diameter 1.8 mm. (a) determine the maximum fuel temperature that can be achieved by irradiating the pellet with 200 lasers, each producing a power of 550 w. the pellet has an absorptivity 0.3 and emissivity 0.8.

1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?