Represent the resultant of the three forces and couple by a force-couple system located at point A. The couple is positive if counterclockwise, negative if clockwise. 7 kN 1.6 m 4.2 m 2.2 m 5 kN 170° 2.9 m 16 kN-m 3 kN Answers: R = ( i i+ i j) kN MA = i kN-m
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- Set the controls as follows. m = 8 kg v0 = 4 m/s F = 12 N If you wanted the box to reach a distance of x = 10 m in 1.05 seconds, what value would you change the force (in N)?An automobile is going up a grade of 15 with an initial velocity of 30 m/s. The coefficient of static friction between the tires and the road is 0.7. a) What minimum distance does it take to stop the car? b) What minimum distance would it take to stop the car if it were going down the grade?Compute the total force to be exerted on the object given the indicated parameters.
- Determine the speed v which the 680-kg four-man bobsled must have in order to negotiate the turn without reliance on friction. Also find the net normal force N exerted on the bobsled by the track. 37 -p = 57 m Answers: V = i m/s N = i kNA loaded grocery cart is rolling across a parking lot in a strong wind. You apply a constant force F = (27 N) - (38 N) to the cart as it undergoes a displacement s(-8.5 m)i (3.0 m)j.The diagram shows all the forces on an object with mass m = magnitude of the acceleration of the object? 89 kg. What is the 480 N Select one: O 9.4 m/s? 30° O 6.0 m/s? 3.0 m/s? 120 N O 4.5 m/s sine and cosine reversed. Check that you didn't get 11.5 m/s? 240 N
- In the figure shown, represent the resultant of the 3 forces and the couple by a force–couple system (in kN-m, roundoff to 2 decimal places, + cw and - ccw) located at point A. M1=10kN-m L1=2.5m F1=5kN L2=1.5m F2=3kN L3=3.5m F3=4kN L4=2mA "swing" ride at a carnival consists of chairs that are swung in a circle by 12.4 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 135 kg. (a) Determine the tension in the cable attached to the chair. (b) Find the speed of the chair.P2-3. Sketch the following forces on the x, y, z coordinate axes. Show a, B, y. F={-40i – 80j + 60k} kN
- Suppose a toy car experiences two horizontal forces: A time-dependent force from its motor of F = 2.0e-0.5tN, and kinetic friction with a coefficient of u = 0.1 from its wheels and bearings. What will its maximum speed be on level ground if it starts from rest? %3D %3DA roller coaster has a vertical loop of radius 25.0 m. If the roller coaster operates at a constant speed of 30.0 m/s while in the loop, what normal force does the seat provide for a 60 kg passenger at the bottom of the loop? O 2775 N 2748 N O 588 N O 1305 N ) 1572 N O 2160 NDetermine the resultant of the forces shown in Figure P6-13. Find the coordinates. ly 10 kN -X Z 25 KN 15 KN