A 75.0 kg swimmer dives horizontally off a 500.0 kg raft. The diver’s speed immediately after leaving the raft is 4.00 ms. A micro-sensor system attached to the edge of the raft measures the time interval during which the diver applies an impulse to the raft just prior to leaving the raft surface. If the time interval is read as 0.200 s, what is the magnitude of the average horizontal force by diver on the raft?

Given that A→+2B→=x1i^+y1 j^ and A→-B→=x2i^-y2 j^, what is B→?

A frictionless track is shown in Fig. 4.1 below. A block of mass m = 5 . 00   k g  slides down an incline of height h = 15 . 0   m with an angle of inclination α = 60 . 0 ° . It passes points A, B, C, D, E, A of a circle of radius R = 10 . 0   m  before returning to the horizontal track. (a) What minimum speed v 1 , m i n  does the block have to start in order for it to complete the circular motion without falling? If the block starts at height h = 15 . 0   m  with an initial speed of v 1 , i = 1 . 50 v 1 , m i n , (b) what is the magnitude and direction of the normal force exerted on the block when it is at point C, which is the top of the circle? If the track has a small rough region with coefficient of kinetic friction μ k = 0 . 600  and the length of the region is l = 10 . 0   m , as shown in Fig. 4.2, (c) what minimum speed v 2 , m i n  does the block have to start with after releasing from the incline of height h = 15 . 0   m  in order for it to complete the circular motion without falling? If the block starts at h = 15 . 0   m  with an initial speed of v 2 , i = 1 . 50 v 2 , m i n  and goes through the track shown in Fig. 4.2, (d) what are the magnitude and direction of the normal force exerted on the block when it is at point E, which is 60 . 0 °  from the vertical, and (e) what are the magnitude and direction of the block’s tangential acceleration at point E? (Note: Fig. 4.1 is for questions (a) and (b); and Fig. 4.2 is for questions (c), (d), and (e).) fig4_q20.jpg

A rock attached to a string swings in a vertical circle. Which diagram could correctly describe the force(s) on the rock when the string is at the lowest point?

Define the difference between arcadia and cockaigne.

Argue for the premise that The Communist Manifesto is a millennial text rather than a utopian one. Or, argue that it is more utopian than millennial. 

What is the problem with the New Green Deal according to Saitō?

This gap in the neuromuscular junction is called the _________.

The two key sources of stress for adults caring for their parents include the parent’s functional decline and if the care______________.

A fifty-year-old’s brain is showing signs of the initial development of neuritic plaques and a few neurofibrillary tangles. This is___________.