I need help, i'm not sure if i have the correct answers and i'm scared to submit them.
A man carries a 10 kg sack of groceries in his arms with a force of 50 N as he walks forward a distance of 10 m. How much work has he done?
(Points : 1)
0 J
50 J
100 J
500 J <----
In which of the following situations has the energy of the object been increased?
(Points : 1)
A hammer thrower spins around while preparing to release the hammer.
A horse moves horizontally while a circus performer jumps vertically on its back. <----
A boy pushes a lawn mower forward by pushing at a downward angle on the handle.
A soldier runs forward, while holding a rifle above his head.
A rope pulls on a metal box at an angle of 60.0° with a force of 255 N. The box moves horizontally for 15.0 m. How much work was done on the box?
(Points : 1)
255 J
1,910 J
3,310 J
3,830 J <----
1 answer
1 answer