# Matakiljoy's documents

### The wing of an airplane has an average cross-sectional area of 11 m 2 and experiences a lift force of 60,000 N.

• December 2017
• 220

### A running back with a mass of 90 kg and a velocity of 9 m/s (toward the right) collides with, and is held by, a 135-kg defensive tackle going in the opposite direction (toward the left). What is the velocity of the tackle before the collision for their velocity afterward to be zero? (Remember, velocity is a vector)

• December 2017
• 228

### A 5,500-kg truck runs into the rear of a 1,000-kg car that was stationary.

• December 2017
• 307

### A race car rounds a curve at 53 m/s. The radius of the curve is 450 m, and the car's mass is 665 kg.

• December 2017
• 218

### A jet aircraft with a mass of 4675 kg has an engine that exerts a force (thrust) of 60,100 N. What is the jets acceleration?

• December 2017
• 350

### A huge explosion is heard 77 kilometers away. How long does it take the sound to travel that far?

• December 2017
• 225

### A submarine dives to a depth of 114.2 meters in the ocean. What is the force (in Newtons) acting on a hatch that has an area of 2.7 square meters?

• December 2017
• 254

### A 47 gram silver bullet traveling at 963 mph strikes an armor plate and comes to a stop.

• December 2017
• 419

### The current through a T1? {1 resistor is 135 mA. To the nearest volt, what is the potential difference across the resistor?

• December 2017
• 223

### An aluminum wing on a passenger jet is 32 m long when its temperature is 18C. At what temperature would the wing be 8 cm (0.08 m) shorter?

• December 2017
• 329

### A 0.09-kg lead bullet traveling 227 m/s strikes an armor plate and comes to a stop. If all of the bullet's energy is converted to heat that it alone

• December 2017
• 439

### Air in a balloon does 35 J of work while absorbing 97 J of heat. What is its change in internal energy?

• December 2017
• 75

### An aircraft with a weight of 9253 N accelerates from 0 to 90 m/s in 9.8 seconds, at which time the aircraft launches. What is the kinetic energy of

• December 2017
• 224

### Assume the only grades possible in a history course are A, B, C, or lower than C. The probability that a randomly selected student will get an A

• December 2017
• 351

### It takes an elevator 3.6 minutes to raise a vehicle with a weight of 3863 N from the floor to a height of 7 meters. What size (power) motor (in

• December 2017
• 233

### A 191.5 kg satellite is in a circular orbit of 22,000 miles (35,405,000 m) in radius. The force keeping the satellite in orbit is 46.5 N.

• December 2017
• 262

### A 0.11 kg bullet traveling at 1565 mph hits a 6.3 kg block of wood and stays in the wood. What is the velocity (speed) of the wood block immediately

• December 2017
• 324

### A juniper-wood plank measuring 0.33 ft by 1 ft by 12 ft is totally submerged in water. a. What is its weight?

• December 2017
• 440

### A storage tank 29 m high is filled with pure water . (Assume the tank is open and exposed to the atmosphere at the top.

• December 2017
• 303

### The water in the plumbing in a house is at a gauge pressure of 370,000 Pa. What force does this cause on the top of the tank inside a water heater if

• December 2017
• 230

### The mass density of an object is 20.3 g/cc, and its volume is determined to be 28.2 cc. What is the mass of the object?

• December 2017
• 277

### An object with a mass of 46.0 g displaces 847.5 ml of water when it is completely immersed. What is the buoyant force on the mass?

• December 2017
• 250

### The mass density of an object is 19.0 g/cc, and its mass is determined to be 136 g. What is the volume of the object?

• December 2017
• 278

### 1. What is the magnitude of the acceleration of a modified Atwood machine if the mass of the cart is 8 kg and the hanging mass is 2 kg?

• December 2017
• 660
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