Questions from College Physics

Q: Two automobiles of equal mass approach an intersection. One vehicle is

Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 13.0 m/s toward the east, and the other is traveling north with velocity v2i. Neither driver sees the oth...

Q: A billiard ball moving at 5.00 m/s strikes

A billiard ball moving at 5.00 m/s strikes a stationary ball of the same mass. After the collision, the first ball moves at 4.33 m/s at an angle of 30.0° with respect to the original line of motion. (...

Q: The Merlin rocket engines developed by SpaceX produce 8.01 x

The Merlin rocket engines developed by SpaceX produce 8.01 x 105 N of instantaneous thrust with an exhaust speed of 3.05 x 103 m/s in vacuum. What mass of fuel does the engine burn each second?

Q: One of the first ion engines on a commercial satellite used Xenon

One of the first ion engines on a commercial satellite used Xenon as a propellant and could eject the ionized gas at a rate of 3.03 x 10-6 kg/s with an exhaust speed of 3.04 x 104 m/s. What instantane...

Q: NASA’s Saturn V rockets that launched astronauts to the moon were powered

NASA’s Saturn V rockets that launched astronauts to the moon were powered by the strongest rocket engine ever developed, providing 6.77 x 106 N of thrust while burning fuel at a rate of 2.63 x 103 kg/...

Q: A typical person begins to lose consciousness if subjected to accelerations greater

A typical person begins to lose consciousness if subjected to accelerations greater than about 5g (49.0 m/s2) for more than a few seconds. Suppose a 3.00 x 104-kg manned spaceship’s engine has an exha...

Q: A spaceship at rest relative to a nearby star in interplanetary space

A spaceship at rest relative to a nearby star in interplanetary space has a total mass of 2.50 x 104 kg. Its engines fire at t = 0, steadily burning fuel at 76.7 kg/s with an exhaust speed of 4.25 x 1...

Q: A spaceship’s orbital maneuver requires a speed increase of 1.20

A spaceship’s orbital maneuver requires a speed increase of 1.20 x 103 m/s. If its engine has an exhaust speed of 2.50 x 103 m/s, determine the required ratio Mi/Mf of its initial mass to its final ma...

Q: Suppose an asteroid has a semimajor axis of 4 AU. How

Suppose an asteroid has a semimajor axis of 4 AU. How long does it take the asteroid to go around the Sun? (a) 2 years (b) 4 years (c) 6 years (d) 8 years

Q: In research in cardiology and exercise physiology, it is often important

In research in cardiology and exercise physiology, it is often important to know the mass of blood pumped by a person’s heart in one stroke. This information can be obtained by means of a ballistocard...