(b) (c) From the graph, estimate the total change in momentum experienced by the projectile, due to the compressed gas. The speed of the projectile changes from zero to 270 m s-¹ as it leaves the barrel. What is the change in momentum of the projectile? (d) Compare your answers in (b) and (c) and suggest a possible reason for the difference.

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Part A Ignoring the mass of the spring, what is the mss mmm of the fish? Express your answer in kilograms.

60° 30° A 50 kg truck engine is lifted using the setup shown. Assuming that the pulleys are frictionless, What force P must be applied to the cable to hold the engine in the position shown with d= 1m? (Hint: because the frictionless pulleys, the tension in the cable will be uniform through out the whole length of the cable.) 2. 3. d 30 kg 600 N/m A 3m 3m Determine the reactions at A and B. 50 kg

For part B (answer is 0.28m) can you draw where the perpendicular distance between 48N forces is? And also can you show me the equation for part B? Because for part A (answer is 13.44N) I used M = Fx • Dy Fx is 84 kN and Dy is 16cm. I’m confused that the answer key for part B uses M = Fy • Dx M= 13.44 N•M Fy= 48 N I’m probably misunderstanding Dx at part B. So can you fully explain this question. Thank you!!!

A 1,040-N crate is being pushed across a level floor at a constant speed by a force  F  of 390 N at an angle of 20.0° below the horizontal, as shown in the figure a below. Two figures show a side view of a crate positioned upon a horizontal surface. Figure (a): An arrow pointing downward and to the right is labeled vector F and forms an angle of 20° below the horizontal as it approaches the upper left edge of the crate. Figure (b): An arrow pointing upward and to the right is labeled vector F and forms an angle of 20° above the horizontal as it extends from the upper right edge of the crate. (a) What is the coefficient of kinetic friction between the crate and the floor? (Enter your answer to at least three decimal places.)(b) If the 390-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in the figure b, what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a).

¥ Question Completion Status: QUESTION 1 Three identical blocks of mass m on a frictionless surface are connected by massless taut strings. A force Fis applied on the rightmost block as shown in the figure below so that each block moves to right with acceleration a. T2 T1 Applying Newton's second law on the rightmost block: EFx= = ma Applying Newton's second law on the block at the center: EFx = T2 D Applying Newton's second law on the leftmost block: EFx= = ma %3D If each block has a mass of 10 kg and is accelerating at 2 m/s-, the magnitude of the tension on the second string is T2 = N. QUESTION 2

A hook A is at (1 m, -2 m, 2 m). A force ?⃑ = {−6?̂+ 9?̂+ 3? } ? is exerted on the hook. Deterine the angle between the force and the position vector ?⃑??, where O is the origin of thecoordinate system. Show the diagram.

Problem 3: A force is acting on a block with a magnitude of F = 87 N. The force makes an angle of 0 = 19° with respect to the horizontal, as shown in the figure. Randomized Variables F = 87 N 0 = 19° F

PA particle moves along the x-axis while being aubjected to one variable force The force is decribed Assume the particle moves from X=2 to position X=3 on the X-axis. If the partidle began from rest at X=2,then how fast is it moving at x-3 it it has a massof 200grams? A)27.25 mls B33.19 mls o17.44 mls D22.08 m/s E) 38.04 mis. 04 mIs.