14 Two concurrent forces act at right angles to each other on an object. If the magnitude of one of the forces is 40. newtons and the magnitude of the resultant of the two forces is 50. newtons, the magnitude of the other force must be (2) 20. N (1) 10. N (3) 30. N (4) 40. N

11. Jason works for a moving company. A crate of mass m is sitting on a ramp on his truck; the ramp is angled at an angle with respect to the horizontal. The coefficients of static friction and kinetic friction between the crate and his truck bed are p, and , respectively. What is the magnitude of the force, directed parallel to the ramp, that he needs to exert on the crate to get it to start moving (a) up the ramp and (b) down the ramp? Your answers will be in terms on the symbols m, 0, μs, k and g.

38) Help me to solve this question, no handwritten, only typing

3. At the August Dutchess County Fair, 8 children, each 40 lbs, travel counterclockwise on a Ferris wheel with a 5 m radius. The wheel rotates with uniform speed, making one full turn every 10 seconds, and the children are each in contact with only a flat bench that can exert both frictional and normal forces. Specify the magnitude (in Newtons) and direction (up, down, left, right) of each contact and non-contact force acting on B) A) The child at the bottom of the wheel. B) The child at the top of the wheel. C) The child halfway down from the top of the wheel. D) The child halfway up to the top of the wheel. A)

De 600 N 4 m 900 N 4 m A -6m 22- forces in member [ED] : F(ED) forces in member [DC]: F(DC) forces in member [BC] : F(BC) Which following one is TRUE? O A) F(EC)=1500 N O B) F(DC).cos37 = F(BC) O F(DC).sin37 = F(ED) O D) F(ED).sin53- F(DC) O E) F(ED).cos53 = F(DC)

4. A 50.0-kg crate is being pulled along a horizontal smooth sSurface. The pulling force is 10.0 N and is directed 20.0° above the horizontal. What is the magnitude of the acceleration of the crate? A) 0.0684 m/s2 B) 0.188 m/s2 C) 0.200 m/s2 D) 0.376 m/s2 E) 0.0728 m/s2 Final formula: Required steps: 1) Draw free body diagram 2) Choose reference frame 3) Find vectors components 4) Apply Newton's 2nd law 5) Solve for a algebraically 6) Check units 7) Substitute numerical values

Problem 4 The upper leg muscle (quadriceps) exerts a force of 1250 N, which is carried by a tendon over the kneecap (the patella) at the angles shown in the figure. Find the direction and magnitude of the force exerted by the kneecap on the femur. Fo = 1250 N 55° 75 Fo