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The plot shows the net force in the x direction versus time for a particle of mass 1 kg. Which of the plots of the x component of the velocity versus time corresponds to this net force in the x direction?  

A ball rolls horizontally off the edge of a cliff that is 10 m high. It strikes the ground at a distance 4.0 m away from the edge of the bottom of the cliff. About how long is the ball in the air? Take g = 10 m/s2

Four identical blocks each of mass m are arranged as shown on a frictionless surface. Block 1 is pushed with a force F. The coefficient of friction between the blocks is large enough that the blocks do not slide with respect to one another (so there is a friction between the blocks but no friction from the horizontal surface). We can neglect drag from the air.  Your friend draws the free body diagram on block 3.  You are asked to evaluate their work and you start by making sure they have the right number of forces. You tell your friend 

A set of blocks with masses mA and mB are connected to each other by a string over a frictionless pulley as shown below; both masses remain in contact with the surface which is frictionless. What is the magnitude of the mA’s acceleration?

Which of the curves on the graph below best represents the vertical component vy of the velocity versus the time t for a projectile fired at an angle of 45° above the horizontal? Use the standard convention that the y axis is vertical with positive being upward and x axis is horizontal and to the right. 

Graph the linear equation.y = –5

The law of diminishing marginal product of labor is relevant only in the short run.

“The worker is free only in the performance of his animal functions – eating, drinking, procreating…. and in his human functions [labor] he no longer feels himself to be anything but an animal.” The speaker is ___.

What physiological response is activated by the body when faced with a perceived or actual threat?

What is a potential effect of prolonged stress on a client’s physical health?