Question

19. How does the space shuttle take off and land?

A.It takes off like an airplane and lands like an airplane.
B.It is launched using rockets and parachutes back to the surface.
C.It takes off like an airplane and parachutes back to the surface.
D.It is launched using rockets and lands like an airplane.

20. What is work?
A.the application of force over a distance, causing an object to move in the direction of the force
B.the application of velocity over a distance, causing the object to move in the direction of the velocity
C.the application of velocity
D.the application of force over a distance, causing the object to move perpendicular to the force

21.
Which unit is used to measure work?
A.newton
B.joule
C.ampere
D.meter

22.Which of these is an example of work?
A.pushing down on the floor
B.leaning against a wall
C.pounding a nail into a wall
D.holding a heavy weight

Answer 1

@Euler271

Answer 2

id say 19 is B

Answer 3

work is measured in joules

Answer 4

and last one is C

Answer 5

you don't know the answer to 20?

Answer 6

mechanical work is the amount of energy transferred by a force acting through a distance.

Answer 7

good?

Answer 8

yes so are you saying that 20 is A.?