Chapter 7, Problem 157P

A telemetry system is used to quantify kinematic values of a ski jumper immediately before the jumper leaves the ramp. According to the system  r=560 ft  ,   r˙=−105 ft/s  ,   r¨=−10 ft/s2  ,   θ=25°  ,   θ˙=0.07 rad/s  ,    θ¨=0.06 rad/s2 Determine the velocity of the skier immediately before leaving the jump. The velocity of the skier immediately before leaving the jump along with its direction is ? I have 112.08 ft/s but can't seem to get the direction correct. Determine the acceleration of the skier at this instant. At this instant, the acceleration of the skier along with its direction is ? acceleration is 22.8 ft/s^2 but need help with direction. Need help with velocity direction and acceleration direction please.

For the stop bracket shown, locate the x coordinate of the center of gravity. Consider a = = 16.50 mm. 34 mm 62 mm 51 mm 10 mm 100 mm 88 mm 55 mm 45 mm The x coordinate of the center of gravity is mm.

In the given figure, the bent rod ABEF is supported by bearings at C and D and by wire AH. The portion AB of the rod is 250 mm long, and the load W is 580 N. Assume that the bearing at D does not exert any axial thrust. H B A с 30° 250 mm D Z 50 mm 300 mm F 250 mm 50 mm W Draw the free-body diagram needed to determine the tension in wire AH and the reactions at C and D.

A 10-ft boom is acted upon by the 810-lb force as shown in the figure. D 6 ft 6 ft E B 7 ft C 6 ft x 4 ft W Draw the free-body diagram needed to determine the tension in each cable and the reaction at the ball-and-socket joint at A.

Locate the center of gravity of the sheet-metal form shown. Given: r = 26.40 mm . 50 mm 40 mm X 150 mm The center of gravity (✗) of the sheet-metal form is The center of gravity (Y) of the sheet-metal form is The center of gravity ( Z ) of the sheet-metal form is mm. mm. (Round the final answer to three decimal places.) mm.

Determine the reactions at the beam supports for the given loading if W = 300 lb/ft . W 6 ft A 9 ft. 6 ft- The reaction at Bis lb. The reaction at A is lb. B

In the given figure, the bent rod ABEF is supported by bearings at C and D and by wire AH. The portion AB of the rod is 250 mm long, and the load W is 580 N. Assume that the bearing at D does not exert any axial thrust. 30° 250 mm 300 mm 50 mm H B C D 50 mm W 250 mm Determine the reactions at C and D. (Include a minus sign if necessary.) The reaction at Cis N) j + N)k The reaction at Dis N) j + ( N)k

Consider the angle bar shown in the given figure A B W 240 mm- 80 mm Determine the reactions at A and B when a = 150 mm and W = 320 N. The reaction at A is N ZI The reaction at Bis N.

In the given figure, the bent rod ABEF is supported by bearings at C and D and by wire AH. The portion AB of the rod is 250 mm long, and the load W is 580 N. Assume that the bearing at D does not exert any axial thrust. H B A 30° 250 mm D 300 mm 50 mm 50 mm W Determine the tension in wire AH. The tension in wire AH is N. 250 mm x