5) A 5000 kg airplane is flying in a circle. a. What is the weight of the airplane? b. How much force is needed to hold it in a 500 m circle with a speed of 60 m/s? C. The wings provide a lift equal to the weight and also an inward centripetal force. What total force must the wings provide?

1. If both the mass and speed of an object are doubled while the radius is decreased by 4x, then the centripetal force is? 2. A 5 kg object has a kinetic energy of 90 Joules. What is the speed of this object? 3. The momentum of a 500 g object is 2000 kg m/s. What is the speed of this object? 4. A ball is thrown straight upward at an initial speed of 70 m/s. What is the acceleration of the object after 13 seconds? 5. An object is thrown straight upward with a speed  of 90 m/s. What is the speed of the object after 13 seconds?

A 2000 kg car going at a steady speed of 18.0 m/s takes a curve with a 50.0 m radius. The road is level. 1. Draw an FBD. 2. Find the centripetal force of the car. 3. Find the frictional force of the car. 4. Find the weight of the car. 5. What is the minimum value that the coefficient of static friction between the tires and the road must have so that the car takes this curve without slipping?

10. A 260-g ball is tied to a string and it is being swung faster and faster in a nearly horizontal circle. When the speed reaches 16.5 m/s the tension reaches a value of 60.0 N, the string breaks. What is the radius of the circle? cm

An astronaut has a weight of 500 N on the Earth. They then travel to a new planet which has twice the mass of the Earth and twice the radius of the Earth. The weight of the astronaut on this new planet would be a. 500 N b. 2000 N с. 250 N O d. 125 N O e. 1000 N

MCQ 5. A roller-coaster car has a mass of 500 kg when fully loaded with passengers. The car passes over a hill of radius 15 m, as shown. At the top of the hill, the car has a speed of 8.0 m/s. What is the force of the track on the car at the top of the hill? 15 m 8.0 m/s a. 7.0 kN up b. 7.0 kN down c. 2.8 kN down d. 2.8 kN up e. 5.6 kN down 71672

A car rounds an unbanked curve of radius 65 m. If the coefficient of static friction between the road and car is 0.72, then answer the following questions. (a) What force provides the centripetal force? A. Weight of the car B. Normal force on the car from the road C. Force of static friction (b) What is the maximum speed at which the car can traverse the curve without slipping? Enter to 2 significant figures Vmax= 18.07 m/s

A 200-grams wooden ball is tied to the end of the string 60 cm long and passes through the steel tube. The ball rotates in horizontal circle at constant speed and complete 10 revolutions in 5 seconds. Calculate: a.The centripetal acceleration on the ball (in m/s). b.The tension force in the string (in Newton).

1. A car rounds an unbanked curve of radius 70 m. If the coefficient of static friction between the road and car is 0.73, then answer the following questions. (a) What force provides the centripetal force? OA. Weight of the car OB. Normal force on the car from the road OC. Force of static friction (b) What is the maximum speed at which the car can traverse the curve without slipping? m/s Vmax =

mm.2 Humpback whales sometimes catch fish by swimming rapidly in a circle, blowing a curtain of bubbles that confuses a school of fish and traps it in a small area, where the whales can easily catch and eat them. Suppose a 25,000- kg humpback whale swims at 2.3 m/s in a circle of radius 8.6 m . What centripetal force must the whale generate?