In which of the following scenarios does object 1 do +10 joules of work on object 2?

a. object 1 exerts a 10 newton force on object 2 in the direction of its 1 meter displacement.
b. object 1 exerts a 1 newton force on object 2 in the direction of its 10 meter displacement.
c. object 1 exerts a 10 newton force at a 60 degree angle relative to its 2 meter displacement.
d. all of the above are true.
e. only two of the above are true.
f. none of the above are true.

The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2

What is the final velocity of the initial velocity of 25 and -50?

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.