force problem

Three blocks are configured as in the attachment. A string is attached from block #1 to block #2 (looped over a pulley), and the angle between the string going from mass #2 to the pulley, with respect to straight downward, is θ (block #2 is hanging there, not touching block #3). An external force F is pushing on block #3. (a) Derive an expression for F such that θ does not change with time and block #1 does not move with respect to block #3 (in other words, the whole configuration remains the same as it accelerates to the right). Ignore friction throughout the problem. (b) Is it possible for this configuration to remain if M2>M1? Explain your reasoning. (c) Now suppose... click for more

Test prep questions

These are questions to prep for a test tommorow. No answers were provided. Please help with question 3.

newtons law i need help with number 65 on the attached jpeg file

Find the frictional force exerted on Block A given that the mass of block A is 8.50kg, the mass of block b is 2.25 kg and the coefficient of static friction between block a and the the surface on which it rests is 0.320 (b) if the mass of block a is doubled does the frictional force exerted on it increase, decrease, or stay the same. explain Picture shows block a on a table pullin block b off of the floor attached to a ring at the wall with the rope at a 45 degree angle

Acceleration,distance,and velocity

Car A accelerates from rest with 2m/sec^2 and Car B is moving with a constant velocity of 25 m/s. at the instant t=0. Determine (a) distance between the two cars at t=5 sec. (b) time for the cars to arrive at the same location. (c) distance of car A from the origin when they arrive at the same location. (d) speed of car A at the instant they arrive at same location. (e) acceleration needed for car B to come to a stop over a distance of 100 meters.

Pphysics word problem

A child sits on a rotating merry-go-round, 2.1 meters from its center. If the speed of the child is 1.0 m/s, what is the minimum coefficient of static friction between the child and the merry go round that will prevent the child from slipping.