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- A black widow spider hangs motionless from a web that extends vertically from the ceiling above. If the spider has a mass of 1.5 g, what is the tension in the web?The figure below shows a bird feeder that weighs 193.9 N. The feeder is supported by a vertical cable, which is in turn tied to two cables, each of which is attached to a horizontal post. The left cable makes a 60° angle with the post, while the right cable makes a 30° angle. What is the tension in each cable (in N)? left cable=? right cable=? bottom cable=?Jason is pulling a box across the room. He is pulling with a force of 24 newtons and his arm is making a 69 angle with the horizontal, what is the horizontal component of the force he is pulling with?
- A push and a pull of magnitude F1=3.9 N and F2=5.8 N act on a block of weight 11 N resting and not moving on a rough surface as shown in the figure linked below. The push F1 is horizontal, while the pull F2 acts at angle θ=46 deg with the horizontal How large is the friction force exerted by the surface on the block?The 2.0 kg wood box in the figure (Figure 1) slides down a vertical wood wall while you push on it at a 45 ∘ angle. The coefficient of kinetic friction of wood on wood is μk = 0.200. What magnitude of force should you apply to cause the box to slide down at a constant speed?A body hangs from a spring balance supported from the roof of an elevator. If the elevator has an upward acceleration of 4 m/s2 the balance reads 45N, what is the true weight of the body?
- Jason is pulling a box across the room. He is pulling with a force of 21 newtons and his arm is making a 45 angle with the horizontal, what is the vertical component of the force he is pulling with?A picture frame hung against a wall is suspended by two wires attached to its upper corners. If the two wires make the same angle with the vertical, what must this angle be if the tension in each wire is equal to 0.75 of the weight of the frame? Show the Figure/FBD, given and formula usedA painter stands on a horizontal uniform scaffold hung by its end from two vertical ropes A and B, 6 meters apart. The scaffold weighs 200 N. The tension on A is 750 N and that in B is 250 N. a) What is the weight of the painter? b) How far from A is he standing? Show the Figure/FBD, given and the formula used
- In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the overhead view of the figure. The tire remains stationary in spite of the three pulls. Alex pulls with force of magnitude 202 N, and Charles pulls with force of magnitude 148 N. Note that the direction of Charles' force is not given. What is the magnitude of Betty's force?Bob has a total weight of 700 N and is standing on a scaffold hanging by 2 ropes. The supporting ropes are applying an upward force of 1200 N. What is the weight of the scaffold itself?Margie, who weighs 649 N, is standing on a bathroom scale that weighs 55.0 N. a. With what magnitude force does the scale push up on Margie? answer in N b. attached picture 1 c. With what magnitude force does the floor push up on the scale? answer in N d. attached picture 2
