A5-kg object slides down a frictionless surface inclined at an angle of 30º from the horizontal. the total distance moved by the object along the plane is 10 meters. the work done on the object by the normal force of the surface is?

Workdone =0

Explanation:

The body is inclined at θ=30°,     s=10m,  m=5kg

Workdone by the object = FsCosθ

but the surface is a friction-less surface, this means coefficient of friction =0

F=μR

F=0*R

F=0

W=FScosθ

W=0*SCosθ

W=0

i think the answer is b

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper.