Chris' 2D Motion and Projectile Problems

# Chris' 2D Motion and Projectile Problems - Force Problems...

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Force Problems in Two Dimensions 1. A large box is sliding without friction on a floor at an initial velocity of 6.4 m/s in the x direction. Tom and Jane would like to redirect the box’s motion by pushing on the box. Tom pushes with a constant force of 81 N opposite the box’s initial motion. Jane pushes with a constant force of 105 N perpendicular to Tom’s push direction, i.e., she pushes in the positive y direction. Both Tom and Jane push for 3.0 seconds and then let go of the box. What is the final velocity of the box (magnitude and direction) if the box has a mass of 62 kg. 2. A 110 kg crate is pushed at constant velocity up a frictionless ramp with a Force F applied to the crate in the horizontal direction. The ramp is inclined at an angle of 34 degrees. Find the force F. (See figure below) 3. A missile takes off at an angle of 27 degrees with respect to the horizontal, and accelerates at 2.62 m/s 2 . The missile has a weight of 79,300 N. Find the thrust force T on the missile and the lift force L exerted by the air perpendicular to the missile ’s bottom surface.

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## This note was uploaded on 04/04/2010 for the course PHYS 1A PHYS 1A taught by Professor Smith during the Fall '10 term at UCSD.

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Chris' 2D Motion and Projectile Problems - Force Problems...

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