Question

A searchlight 60 ft from a straight wall is rotating at a constant angular rate. If...

A searchlight 60 ft from a straight wall is rotating at a constant angular rate.

If the beam is moving along the wall at 4 ft/sec when it is perpendicular to the wall, how

many revolutions does the searchlight complete per minute?

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A flywheel with a diameter of 2.38 m is rotating at an angular speed of 121...
A flywheel with a diameter of 2.38 m is rotating at an angular speed of 121 rev/min. (a) What is the angular speed of the flywheel in radians per second? (b) What is the linear speed of a point on the rim of the flywheel? (c) What constant angular acceleration (in revolutions per minute-squared) will increase the wheel's angular speed to 933 rev/min in 71.7 s? (d) How many revolutions does the wheel make during that 71.7 s?
A flywheel with a diameter of 2.32 m is rotating at an angular speed of 103...
A flywheel with a diameter of 2.32 m is rotating at an angular speed of 103 rev/min. (a) What is the angular speed of the flywheel in radians per second? (b) What is the linear speed of a point on the rim of the flywheel? (c) What constant angular acceleration (in revolutions per minute-squared) will increase the wheel's angular speed to 1120 rev/min in 67.8 s? (d) How many revolutions does the wheel make during that 67.8 s?
Starting from rest, a fan accelerates with constant angular acceleration. At one time it is rotating...
Starting from rest, a fan accelerates with constant angular acceleration. At one time it is rotating at 10 rev/s; 20 revolutions later, its angular speed is 150 rev/s. (a) The angular acceleration. (b) The time required by the fan to complete the 20 revelations. (c) The number of revolutions from rest until the fan reaches the 10 rev/s angular speed.
A balloon is rising vertically above a level, straight road at a constant rate of 1...
A balloon is rising vertically above a level, straight road at a constant rate of 1 ft/sec. Just when the balloon is 69ft above the ground, a bicycle moving at a constant rate of 18ft ft/sec passes under it. How fast is the distance (t) between the bicycle and balloon increasing 3 seconds later?
A 18 ft ladder leans against a wall. The bottom of the ladder slides away from...
A 18 ft ladder leans against a wall. The bottom of the ladder slides away from the wall at a rate of 3ft/sec How fast is ladder sliding down the wall when the base of the ladder is 10 ft away from the wall? ft/sec. Round your answer to three decimal places.

A lighthouse is located on a small island 4 miles away from the nearest point P...

A lighthouse is located on a small island 4 miles away from the nearest point P on a straight shoreline and its light makes five revolutions per minute. How fast is the beam of light moving along the shoreline when it is 1 mile from P? Do not round your answer.
A wheel released from rest is rotating with constant angular acceleration of 2.5 rad/s2. (a) After...
A wheel released from rest is rotating with constant angular acceleration of 2.5 rad/s2. (a) After 2.5 s, what is its angular velocity? rad/s (b) Through what angle has the wheel turned? rad (c) How many revolutions has it made? rev (d) What is the speed of a point 1.0 m from the axis of rotation? m/s What is the magnitude of the total acceleration of the same point? m/s2
The flywheel of a steam engine runs with a constant angular velocity of 150 rev/min. When...
The flywheel of a steam engine runs with a constant angular velocity of 150 rev/min. When steam is shut off, the friction of the bearings and of the air stops the wheel in 1.9 h. (a) What is the constant angular acceleration, in revolutions per minute-squared, of the wheel during the slowdown? (b) How many revolutions does the wheel make before stopping? (c) At the instant the flywheel is turning at 75.0 rev/min, what is the tangential component of the...
A 13ft. ladder is sliding down the wall at the rate of 7 ft/sec. Find the...
A 13ft. ladder is sliding down the wall at the rate of 7 ft/sec. Find the rate at which the bottom of the ladder is sliding away from the wall when the top is 5 feet away from the ground.  
A) A ladder 25 feet long is leaning against a wall. If the foot of the...
A) A ladder 25 feet long is leaning against a wall. If the foot of the ladder is pulled away from the wall at the rate of 2 feet per second, how fast will the top of the ladder be dropping when the base is 7 feet from the wall? B) A radar antenna, making one revolution every 3 seconds (one revoluton is 2π radian), is located on a ship that is 5 km from a straight shoreline. How fast...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT