Recent content by PhysicsGirl

Homework Statement An object approaches the bottom of a ramp, point A. It goes up the ramp and turns around at point B, which is 40.0 m above A. The ramp makes an angle of 30.0 degrees with the horizontal. What is the speed of the object at point A? Neglect friction. Homework Equations...

Homework Statement A mass of 100 g is tied to the end of an 80.0 cm string and swings in a vertical circle about a fixed center under the influence of gravity. The speed of the mass at the top of the swing is 4.00 m/s. What is the tension in the string when the mass is at the bottom of its...

Homework Statement An object of mass 2.00 kg is held at a position A, a vertical height of 20.0 m above the ground. Point B is 8.00 m directly below A. Neglect air resistance and use g=10.0 m/s(squared) What is the ratio of the total energy of the object at position A to position B? Homework...

Physics HELP! Homework Statement A 2.00-g bullet hits and becomes embedded in a 5.00-kg wood block which is hanging from a 1.40-m long string. This causes the block to swing through an arc of 4.50. What was the speed of the bullet before it hit the block?Homework Equations The Attempt at a...