Arunner taking part in the 200 m dash must run around the end of a track that has a circular arc with a radius of curvature of 45 m. if he completes the 200 m dash in 27.6s and runs at constant speed throughout the race, what is the magnitude of his centripetal acceleration (in m/s^2) as he runs the curved portion of the track?

According to newton's second law, when the same force is applied to two objects of different masses, a the object with greater mass will experience a great acceleration, and the object with less mass will experience an even greater acceleration, b. the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration, c. the object with greater mass will experience a greater acceleration, and the object with less mass will experience a smaller acceleration, d. the object with greater mass will experience a small acceleration, and the object with less mass will experience an even smaller acceleration.

10 newton object is placed 3 meters from the fulcrum. at what distance on the other side would you need to place a 15 newton object to balance the lever? show your work!

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.