Question

A helicopter lifts a 80 kg astronaut 20 m vertically from the ocean by means of a cable. The acceleration of the astronaut is *g*/11. How much work is done on the astronaut by **(a)** the force from the helicopter and **(b)** the gravitational force on her?

Find answers to questions asked by students like you.

Q: Engineering a highway curve. If a car goes through a curve too fast, the car tends to slide out of t...

A: Consider the FBD of the car on banked road.

Q: 7.4. Four measurements are made of the wavelength of light emitted by certain atom. The results, in ...

A: The weighted average of measurements is,

Q: A proposed space station consist set of a circular tube that will rotate about its center (like a tu...

A: Given,

Q: At one moment aN object in free fall is moving upward with a velocity of 30m/s . How fast would the...

A: Newton's equation of motion for final velocity is,

Q: Car A uses tires for which the coefficient of static friction is 0.329 on a particular unbanked curv...

A: When an object is moving in a circular path, there is a force acting on it towards the center of the...

Q: A simple wheel has the form of a solid cylinder of radius r with a mass m uniformly distributed thro...

A: Given:Mass of the cylinder = mRadius of the cylinder = r

Q: 2) Angelica ran at her top speed of 0.125 mi/min for 4 minutes. How far did she get?

A: The speed of the angelica,

Q: Part a to c Please A budding electronics hobbyist wants to make a simple 1.5 nF capacitor for tunin...

A: Part (a)Capacitance, CPermittivity, eArea, AVacuum permittivity,

Q: During a circus act, one performer swings upside down hanging from a trapeze holding another, also u...

A: The expression for the stretched length on each leg is,