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Physics Notes – Types of Forces (F ) force – (w ) weight – (T ) tension – (N ) normal – (Ff ) friction – /////////////////////////////////////////////////////////////////////////////////////////////////////////////// 1) A wrecking ball (mass = 1500 kg) is suspended from a cable. It is at rest and hangs straight down. Off to the side, write down how much its velocity, acceleration, and net force are. Draw a vector for the weight and label it with the symbol for weight. Then calculate its weight. Draw a vector for tension and label it with the symbol for tension. How much is the tension? 2) The Mystery Box sits still on a flat table. Its mass is 8.5 kg. Draw a free-body diagram of the box. How much is the normal force? 8.5 kg 3) You push down on the Mystery Box with an extra 15 N of force. Draw a freebody diagram of the box. How much is the normal force? 8.5 kg 4) You attach a string to the Mystery Box and pull it along a frictionless surface with a force of 24 N to the left. Draw a freebody diagram of the box. Find the acceleration (magnitude and direction). 8.5 kg 5) You attach a string to the Mystery Box and pull it along a rough surface with a force of 24 N to the left at constant velocity. Draw all the forces that act on the box and label them. Find the acceleration (magnitude and direction). 8.5 kg