44. GO A special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop ride at an amusement park. The sensor measures the magnitude of the normal force that the seat ex- erts on a rider. The loop-the-loop ride is in the vertical plane and its ra- dius is 21 m. Sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 770 N. At the top of the loop, the rider is upside down and moving, and the sensor reads 350 N. What is the speed of the rider at the top of the loop?

– 3. A 64.3 kg skydiver jumps out of an airplane with a parachute. She decides not to pull the rip cord until she reaches terminal velocity. If the resistive force proportionality constant is 2.35 kg/s, what is the magnitude of the velocity when she decides to pull the cord? (Assume the drag force is proportional to the speed.) - a. 16.4 m/s b. 268 m/s c. 151 m/s d. 9.80 m/s e. 27.4 m/s

Q3. The refrigerator has a weight of 80 kg and rests on a tile floor for which u.= 0.25. also the man has a weight of 70 kg and the coefficient of static friction between the floor and his shoes is µ = 0.5. If he pushes horizontally on the refrigerator, determine if he can move it. If so. does the refrigerator slip or tip? Take g=10m/s² 1.0m 10 1.2m 0.5m A 1.0m

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)

A 756 N person travels in his vehicle through a deep circular-shaped dip in the road. When the vehicle passes through the lowest point of the 50.0 m dip, the seat exerts an 1110 N force on the person. Determine the speed of the vehicle at this point.

10. The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle (r = 10.0 m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel is 0.70, and the angle 0 in the drawing is 23.0°. Find the speed of your suitcase. m/s 60 ssf60 ssf60 ssf60 ssf60 s. sf60 ssf60 ssf60 sio0 ssfo Ossf60 ssf60 sf60 st ssf60 ssf60 ssf60 ssf60 ssf60 ssf60 ssf60 ssfe

A 270-kg object and a 570-kg object are separated by 4.90 m. (a) Find the magnitude of the net gravitational force exerted by these objects on a 32.0-kg object placed midway between them. 1.323 × Draw a picture of the three objects, including the forces exerted on the third. N (b) At what position (other than an infinitely remote one) can the 32.0-kg object be placed so as to experience a net force of zero from the other two objects? 2.61 You appear to be assuming the answer will be a simple ratio of the masses. You must look very carefully at the equations before assuming a simple ratio holds. m from the 570 kg mass toward the 270 kg mass

MY NOTES ASK YOUR TEACHER A Mercedes-Benz 300SL (m = 1750 kg) is parked on a road that rises 20° above the horizontal. (a) What is the magnitude of the normal force? X N 16.1 8 9. (b) What is the static frictional force that the ground exerts on the tires? 5.86 Additional Materials 6. D eBook Submit Answer ?? TOO 2,197 MacBook Air %23 3 4 2 E RO H. D F 3. 2.

A 74507450‑kg car is travelling at 28.728.7 m/s when the driver decides to exit the freeway by going up a ramp. After coasting 404404 m along the exit ramp, the car's speed is 13.513.5 m/s, and it is ℎ=10.7h=10.7 m above the freeway. What is the magnitude of the average drag force ?dragFdrag exerted on the car?