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Q. One on an Incline--One Hanging A block of mass mA = 4.50 kg on a frictionless inclined plane of angle 30.0° is connected by a cord over a massless, frictionless pulley to a second block of mass mB = 2.80 kg hanging vertically.
Q. A rocket engine emits 3.04 x 10^4 J of sound energy every second. The sound is emitted uniformly in all directions. What is the sound intensity level, measured relative to the threshold of hearing, at a distance of 120 m away from the engine? Hint: The threshold of hearing is I0 = 1 × 10-12 W/m2.
A child whose weight is 262 N slides down a 4.80 m playground slide that makes an angle of 49° with the horizontal. The coefficient of kinetic friction between slide and child is 0.09.
Two boxes A and B are connected to each end of a light vertical rope. A constant upward force 80.0 is applied to box. Starting from rest, box descends 10.4 in 3.40. The tension in the rope connecting the two boxes is 37.0
Old MacDonald had a farm, and on that farm he had a gate (see below). The gate is 3m wide and 1.8m high, with hinges attached to the top and bottom. The guy wire makes an angle of 300 with the top of the gate and is tightened by a turn buckle to a..
A 5.00--long ladder has mass 12.5 kg and is leaning against a frictionless wall, making a 64 degree angle with the horizontal. If the coefficient of friction between the ladder and ground is 0.42, what is the mass of the heaviest person who can safel..
You pull your little sister across a flat snowy field on a sled. Your sister plus the sled have a mass of 31 kg. The rope is at an angle of 30 degrees to the ground. As you pull with a force of 30 N, the sled travels a distance of 45 m.
A truck weighs four times as much as a car. if the truck coasts into the car at 12km/h and they stick together, what is their fimal velocity.
What is the potential energy of the elevator
A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.
Find the probability that the electron will tunnel through the barrier.
An object is oscilliating on a spring with a period of 4.60 s . At time t= 0.00 s the object has zero speed and is at x = 8.30 cm . What is the acceleration of the object at t= 2.50 s ?
W hat is crates acceleration
What is the tangential acceleration of a bug on the rim of a 13.0-in.-diameter disk if the disk accelerates uniformly from rest to the angular speed of 77.0 rev/min in 3.40 s.
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