A weight lifter lifts a barbell from the ground, raises it at a constat velocity and holds it motionless over his head. How does the force of the lifter compare with the wieght of the barbell at different stages of the lift?
solve by addition method x +3y +z =6 3x + y z = -2 2x +2y z = 1
A 67.5-kg basketball player jumps vertically and leaves the floor with a velocity of 1.66 m/s upward. (Take upward as positive and forward as positive.) (a) What impulse does the player experience? magnitude direction (up,down, back or zero) (b) What force does the floor exert...
A 0.255-kg volleyball approaches a player horizontally with a speed of 14.2 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0 m/s. (a) What impulse is delivered to the ball by the player? (b) If the player...
A force of magnitude Fx acting in the x-direction on a 2.50-kg particle varies in time as shown in the figure below. (a) Find the impulse of the force. (b) Find the final velocity of the particle if it is initially at rest (c) Find the final velocity of the particle if it is i...
Could someone please help me with this? Is it possible to subtract two polynomials, each of degree 3, and have the difference be a polynomial of degree 2? If so, give an example. If not, explain why not. thanks
Could someone please help me with this? (1) If x is a nonzero real number, is x2 always positive, always negative, or positive or negative depending on whether x is positive or negative? Explain your answer.
physics please help!!
figures should help you. draw the figure of the radar gun and try solving it.
yes ur correct.
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