Asked by jack
A 4.0 kg object is lifted 1.5 m. (a) how much work is done against the earth's gravity ? (b) repeat if the object is lowered insteadof lifted
Answers
Answered by
drwls
The definition of work is (force) x (distance moved in the direction of the force)
(a) In this case, the force is M*g.
I assume that you know the value of g.
M is the mass. Complete the calculation.
(b) Change the sign of the previous answer. Negative work is done by whatever is lowering the weight.
(a) In this case, the force is M*g.
I assume that you know the value of g.
M is the mass. Complete the calculation.
(b) Change the sign of the previous answer. Negative work is done by whatever is lowering the weight.
Answered by
Suze
Answer
Answered by
Akansha
Force X Displacement
Force=mass X gravity
=> m g s
= 4 x 10 x -1.5
= -60 J
Force=mass X gravity
=> m g s
= 4 x 10 x -1.5
= -60 J
Answered by
Anonymous
-58.86J
Answered by
Hell
Wrong*
Answered by
Dee
F=mg
m=4kg
g=9.81
W=Fxd
W=4(9.81)(1.5)
=58.86 or 59 J
m=4kg
g=9.81
W=Fxd
W=4(9.81)(1.5)
=58.86 or 59 J
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