1. In some provinces, you will know the start of the rainy season if you see a good number of beetles. Some of the kids are playing it by tying it up with a string. A 0.01-kg beetle is attached to a string 50 cm long and swings in a horizontal circle, revolving once every 0.80 s. Determine the centripetal acceleration of the mass. 2. From the given equation of centripetal acceleration, what will be the change in centripetal acceleration when: A. velocity doubled without changing its radius B. radius doubled and velocity is constant 3. In a classroom experiment, a student tied a pail with water to the end of a cord and whirled in a horizontal circle of radius 2.0 m completing 2 revolutions in 6 seconds. Determine the velocity of the object.

An astronaut orbiting the Earth is preparing to dock with a Westar VI satellite. The satellite is in a circular orbit 600 km above the Earth's surface, where the free-fall acceleration is 8.24 m/s?. Take the radius of the Earth as 6400 km. Determine the speed of the satellite. m/s Determine the time interval required to complete one orbit around the Earth, which is the period of the satellite. min

8. Callum is playing tetherball. The tetherball has a mass of 0.4 kg and has a tangential velocity of 2.4 m/s. If the tetherball rope is 1.5 m long, what centripetal force does Callum's tetherball have?

21. A car is tied up to the rope of 7 m whose other end is located at the center. If the car is moving at the rate of 5 m/s. Calculate the Centripetal force acting on it. a. F. = 3056.20 N b. F. = 4567.12 N c. Fo = 5357.14 N d. Fc = 6890.7 N %3D %3D 22. John is on top of the building and jack is down. If John throws a ball at an angle of 60° and with initial velocity 20 m/s. At what height will the ball reach after 2 s? a. 15.6 meters b. 17.8 meters c. 19.5 meters d. 20.4 meters 23. A body is projected with a velocity of 20 m/s at 50° to the horizontal. Find the maximum height reached. a. 9.25 meters b. 11.97 meters c.15.38meters d. 18.24 meters

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4. A Hammer thrower swings a 5.0 kg ball that rotates at a constant speed of 4.0 m/s on the end of 2.0 m long string. The string describes a horizontal circle. What is the centripetal acceleration of the object? O 2.0 m/s^2 O 60 m/s^2 O 8.0 m/s/2 O 20.0 m, s^2

3. A Snowbird pilot (mass 55.0 kg) is completing a circular arc during an air show. At the top of the arc, she feels the seat pushing down on her with a force of 2g. (2 x 9.80 m/s? or 19.6 m/s). a)What is the net centripetal force acting on her body? b) If the radius of the circular arc is 150.0 m, what is her plane speed in km/h?

A 0.5 kg mass attached to the end of a string swings (l) in a vertical circle of radius 2 m. When the mass is at the lowest point on the circle, the speed of the mass is 12 m/s. The magnitude of the tension force in the string at that moment is: А. 31.5 N В. 36.7 N C. 56.2 N D. 40.9 N E. 23.7 N

In each of the four situations below an object is experiencing (nearly) uniform circular motion. State what force is providing the centripetal force required to keep the object moving in a circle: а. A car driving around a track. b. A ball being swung on the end of a string. С. The moon orbiting the earth. d. A rotating wheel.

14. An object is swung around on a string in a vertical circle, while its speed is slowly increased. At some point, the string breaks. Where in the object's path would this most likely happen? Explain.