7/30/2019 Answer to ACTIVITY 2.4

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Activity_2.4_Quantifying Forces Fnet=0 (2) REDG040213

ACTIVITY 2.4

Quantifying Forces(Fnet=0) 2

CN_____ Name ____________________________________ Section_______________ Date______________

INSTRUCTIONS:

Use the idea of balanced forces--- all forces to the right must have the same magnitude as those to the

left and all forces up must have the same magnitude as those directed downward. Remember: for an

object to stay in constant speed or state of rest, the net is should be zero.

Identify the magnitude of forces indicated.

N g2y g2F =F =F cos=200cos25=181N

f g2x 2 g2 2F =F +T =F sin+T =200sin25+100=185N

A 20-kg crate resting on a surface is

connected to a 10-kg through a

frictionless pulley as shown. Thefriction between the crate and the

surface is enough to keep the

system at rest. The arrows show the

forces that act on the crate and the

block. Fill in the magnitude of each

forces.

A 20-kg crate resting on a surface is

connected to a 10-kg through a

frictionless pulley as shown. The

friction between the crate and the

surface is enough to keep the

system at rest. The arrows show the

forces that act on the crate and the

block. Fill in the magnitude of each

forces. (the surface is inclined at 25o)

Fg1=100N

T1=100N

T2=100NFf=100N

FN=200N

Fg2=200N

Fg1=100N

T1=100N

T2=100N

Ff=185NFN=181N

Fg2=200N