Question

in which of the following situations has the energy of the object been increased
A. A hammer thrower spins around while preparing to release the hammer
B. a horse horizontally while a circus perfomer jumps vertically on its back
C. a boy pushes a lown mower forward by pushing at a downward angle on the handle
D. A soldier runs forward while holding a riffle above his head
please help me:0

Answer 1

You're not the first person to ask this question.....

Answer 2

I said B the first time...

Answer 3

oh ok thanks for taking your time and answering me

Answer 4

no prob

Answer 5

could you help me with another question?

Answer 6

sure

Answer 7

A man pushes on a box at an angle of 30.0 with a force of 20.0 N and the box moves across the floor. Which of the following component of the force do you use to calcualte work?
A.0.00N
B.10.0N
C.17.3N
D.20.0N
i think the answer is A but i may be wrong

Answer 8

isnt the equation to find work if force time distance

Answer 9

and i get confused because it doesnt gives me a distance it only give me force

Answer 10

20 cos(30) =10N

Answer 11

wait how did you get ten do i insert that equation in the calculator?

Answer 12

oh oops it's not 10
cos(30) is (sqrt 3)/2

Answer 13

and yes, just put it in the calculator

Answer 14

wait so when i insert cons(30) i get .1542

Answer 15

im confused how do i get to the answer?

Answer 16

i meant cos not cons lol

Answer 17

hello?

Answer 18

20 * cosine(30 degrees) in calculator

Answer 19

ok but i still dont get the answer i get something else i get 3.08