85. A block rests on a horizontal frictionless surface. A string is attached to the block, and is pulled with a force of 45.0 N at an angle 6 above the horizontal, as shown in Figure 7-23. After the block is pulled through a distance of 1.50 m, its speed is 2.60 m/s, and 50.0 J of work has been done on it. (a) What is the angle 0? (b) What is the mass of the block?

Given that : F = 45 N Force in horizontal direction = F Cos θ work done = F Cos θ . displacement…

Answered: 85. A block rests on a horizontal frictionless surface. A string is attached to the block, and is pulled with a force of 45.0 N at an angle 6 above the…

College Physics

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85. ... A block rests on a horizontal frictionless surface. A string is
attached to the block, and is pulled with a force of 45.0 N at an
angle 6 above the horizontal, as shown in Figure 7-23. After the
block is pulled through a distance of 1.50 m, its speed is 2.60 m/s,
and 50.0 J of work has been done on it. (a) What is the angle 0?
(b) What is the mass of the block?
F = 45.0 N
v = 0
v = 2.60 m/s
1.50 m

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