Questions from College Physics

Q: Two blocks of masses m and 2m are held in equilibrium on

Two blocks of masses m and 2m are held in equilibrium on a frictionless incline as in Figure P4.57. In terms of m and θ, find (a) The magnitude of the tension T1 in the upper cord and (b)...

Q: The systems shown in Figure P4.58 are in equilibrium.

The systems shown in Figure P4.58 are in equilibrium. If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the inc...

Q: Assume the three blocks portrayed in Figure P4.59 move on

Assume the three blocks portrayed in Figure P4.59 move on a frictionless surface and a 42-N force acts as shown on the 3.0-kg block. Determine (a) The acceleration given this system, (b) The tension i...

Q: A freight train has a mass of 1.5 x 107

A freight train has a mass of 1.5 x 107 kg. If the locomotive can exert a constant pull of 7.5 x 105 N, how long does it take to increase the speed of the train from rest to 80 km/h?

Q: Four forces act on an object, given by A( =

Four forces act on an object, given by A( =40.0 N east, B( = 50.0 north, C( = 70.0 N west, and D( = 90.0 N south. (a) What is the magnitude of the net force on the object? (b) What is the direction of...

Q: To qualify for the finals in a racing event, a race

To qualify for the finals in a racing event, a race car must achieve an average speed of 250. km/h on a track with a total length of 1.60 x 103. If a particular car covers the first half of the track...

Q: Consider a solid metal sphere (S) a few centimeters in

Consider a solid metal sphere (S) a few centimeters in diameter and a feather (F). For each quantity in the list that follows, indicate whether the quantity is the same, greater, or lesser in the case...

Q: As a fish jumps vertically out of the water, assume that

As a fish jumps vertically out of the water, assume that only two significant forces act on it: an upward force F exerted by the tail fin and the downward force due to gravity. A record Chinook salmon...

Q: A hiker walks 2.00 km north and then 3.

A hiker walks 2.00 km north and then 3.00 km east, all in 2.50 hours. Calculate the magnitude and direction of the hiker’s (a) Displacement (in km) (b) Average velocity (in km/h) during those 2.50 hou...

Q: A miniature quadcopter is located at xi = 2.00 m

A miniature quadcopter is located at xi = 2.00 m and yi = 4.50 m at t = 0 and moves with an average velocity having components vav,x = 1.50 m/s and vav,y = -1.00 m/s. What are the (a) x – coordinate (...