Questions from College Physics

Q: A ceiling fan has four blades, each with a mass of

A ceiling fan has four blades, each with a mass of 0.35 kg and a length of 60 cm. Model each blade as a rod connected to the fan axle at one end. When the fan is turned on, it takes 4.35 s for the fan...

Q: A 0.50 kg object, suspended from an ideal spring

A 0.50 kg object, suspended from an ideal spring of spring constant 25 N/m, is oscillating vertically. How much change of kinetic energy occurs while the object moves from the equilibrium position to...

Q: The distance from the center of the breastbone to a man's hand

The distance from the center of the breastbone to a man's hand, with the arm outstretched and horizontal to the floor, is 1.0 m. The man is holding a 10.0 kg dumbbell, oriented vertically, in his hand...

Q: A toboggan is sliding down a snowy slope. The table shows

A toboggan is sliding down a snowy slope. The table shows the speed of the toboggan at various times during its trip. (a) Make a graph of the speed as a function of time. (b) Judging by the graph, i...

Q: A man is rappelling down a vertical wall. The rope attaches

A man is rappelling down a vertical wall. The rope attaches to a buckle strapped to his waist 15 cm to the right of his center of gravity. If the man weighs 770 N, find (a) the tension in the rope an...

Q: A small rowboat has a mass of 47 kg. When a

A small rowboat has a mass of 47 kg. When a 92 kg person gets into the boat, the boat floats 8.0 cm lower in the water. If the boat is then pushed slightly deeper in the water, it will bob up and down...

Q: The 12.2 m crane weighs 18 kN and is lifting

The 12.2 m crane weighs 18 kN and is lifting a 67 kN load. The hoisting cable (tension T1) passes over a pulley at the top of the crane and attaches to an electric winch in the cab. The pendant cable...

Q: Is there anywhere on Earth where a bathroom scale reads your true

Is there anywhere on Earth where a bathroom scale reads your true weight? If so, where? Where does your apparent weight due to Earth’s rotation differ most from your true weight?

Q: A baby jumper consists of a cloth seat suspended by an elastic

A baby jumper consists of a cloth seat suspended by an elastic cord from the lintel of an open doorway. The unstretched length of the cord is 1.2 m, and the cord stretches by 0.20 m when a baby of mas...

Q: A collection of objects is set to rolling, without slipping,

A collection of objects is set to rolling, without slipping, down a slope inclined at 30°. The objects are a solid sphere, a hollow sphere, a solid cylinder, and a hollow cylinder. A frictionless cube...