Blocks with masses of 3.0 kg, 4.0 kg, and 5.0 kg are lined up in a row on a frictionless table. All three are pushed forward by a 15 N force applied to the 3.0 kg block. Part A How much force does the 4.0 kg block exert on the 5.0 kg block? Express your answer with the appropriate units. HA F40 on 5.0 = Value Units Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Part B How much force does the 4.0 kg block exert on the 3.0 kg block? Express your answer with the appropriate units. HA

AP A student, crazed by final exams, uses a force P of magnitude P and angle 0 to push a block of mass m across the ceiling of his room, as in the figure. If the coeffcient of kinetic friction between the block and the ceiling is µk, what is the magnitude of the block's acceleration? NOTE: Express your answer in terms of the given variables, and g. |ā|

A cardboard box rests on the floor of an elevator. The box has a mass m = 2.75 kg and the elevator has an upward acceleration of a.   a.  Write an expression for the sum of the forces acting on the box in the y-direction, ΣFy, given that up is the positive y-direction. Your answer should be in terms of FN, m, and g.  b. Write an expression for the normal force, FN, that the block experiences in terms of the elevator's acceleration, the block's mass, and the acceleration of gravity.  c.  If the elevator's acceleration has a magnitude of g in the downward direction, what would the normal force, FN1 be in Newtons?  d.If the elevator's acceleration had a magnitude of g in the upward direction, what would the normal force FN2 be in Newtons?

A B Two blocks are arranged as shown. Block A is on a frictionless table and has mass 5.1kg and block B has mass 2.8kg. Determine the magnitude of the acceleration of block B.

Part A A small car collides with a large truck. Is the magnitude of the force experienced by the car greater than, less than, or equal to the magnitude of the force experienced by the truck? O equal to less than O greater than Submit Request Answer Part B Choose the best explanation from among the following: O The truck has more mass, and hence the force exerted on it is greater. O The massive truck exerts a greater force on the lightweight car. O Action-reaction forces always have equal magnitude. Submit Request Answer

A 2.6 kg block is attached to a horizontal rope that exerts a variable force Fx = (20 – 5x) N, where x is in m. The coefficient of kinetic friction between the block and the floor is 0.25. Initially the block is at rest at x = 0 m. Part A What is the block's speed when it has been pulled to x = 0.80 m? V = μĂ Value m S ?

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Two ice skaters, with masses of 36.0 kg and 75.0 kg, are at the center of a 40.0 m diameter circular rink. The skaters push off against each other and glide to opposite edges of the rink. Part A If the heavier skater reaches the edge in 20.0 s , how long does the lighter skater take to reach the edge? ΑΣΦ Submit Request Answer

A 1800 kgkg car starts from rest and drives around a flat 50-mm-diameter circular track. The forward force provided by the car's drive wheels is a constant 1000 NN .     Part A What is the magnitude of the car's acceleration at t=13st=13s? Express your answer to two significant figures and include the appropriate units.       aa =

v Question Completion Status: QUESTION 18 As shown in the figure below, a force pushes two mass bodies (mass m, and m) together moving to right horizontally with a constant acceleration on a frictionless and as shown above. With E=10 N, m, = 11 kg, and m,= 13 kg, what is the surface, In the contact surface between m, and m., there are contacting forces E 21 magnitude of F, N Please write your numerical answer with all digits and do not use (Note: For fill in blank, I have set the unit for the answer. So, you just need to provide a number scientific notation. If you are not sure about the number of significant figures, you can keep the number of figures as many as possible - You will not be punished for doing this.) F21 m1 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Type here to search