Questions from College Physics

Q: Three objects with masses m1 = 5.00 kg, m2

Three objects with masses m1 = 5.00 kg, m2 = 10.0 kg, and m3 = 15.0 kg, respectively, are attached by strings over frictionless pulleys as indicated in Figure P5.85. The horizontal surface exerts a fo...

Q: Two blocks, A and B (with mass 50.0

Two blocks, A and B (with mass 50.0 kg and 1.00 x 102 kg, respectively), are connected by a string, as shown in Figure P5.86. The pulley is frictionless and of negligible mass. The coefficient of kine...

Q: A shopper in a supermarket pushes a cart with a force of

A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25° below the horizontal. The force is just sufficient to overcome various frictional forces, so the cart moves at...

Q: A horizontal force of 150 N is used to push a 40

A horizontal force of 150 N is used to push a 40.0 - kg packing crate a distance of 6.00 m on a rough horizontal surface. If the crate moves at constant speed, find (a) The work done by the 150 - N fo...

Q: A block of mass m = 2.50 kg is pushed

A block of mass m = 2.50 kg is pushed a distance d = 2.20 m along a frictionless horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle θ = 25.0Â&...

Q: A 7.00 - kg bowling ball moves at 3.

A 7.00 - kg bowling ball moves at 3.00 m/s. How fast must a 2.45 - g Ping - Pong ball move so that the two balls have the same kinetic energy?

Q: A worker pushing a 35.0 - kg wooden crate at

A worker pushing a 35.0 - kg wooden crate at a constant speed for 12.0 m along a wood floor does 350 J of work by applying a constant horizontal force of magnitude F0 on the crate. (a) Determine the v...

Q: A 62.0 - kg cheetah accelerates from rest to its

A 62.0 - kg cheetah accelerates from rest to its top speed of 32.0 m/s. (a) How much network is required for the cheetah to reach its top speed? (b) One food Calorie equals 4186 J. How many Calories o...

Q: A 6.50 x 102 - kg elevator starts from rest

A 6.50 x 102 - kg elevator starts from rest and moves upward for 3.00 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. (a) What is the average power of the elevator motor du...