A parachutist jumps from a height of 31 times 103m and, Ask an Expert

Academics

A parachutist jumps from a height of 3.1 × 10³m and falls freely for 10 s. She then opens her parachute, and for the next 20 s slows down with an acceleration of -4.5 m/s². After that, she falls the rest of the distance to the ground at a uniform velocity.

(a) What is her velocity just before the parachute opens?

(b) At what altitude does the parachute open?

(d) Calculate the time required for the whole descent.

(e) From what height would she have to fall freely in order to strike the ground with the same velocity as she does when wearing a parachute? (This is how parachutists are trained.)

View complete question

Physics, Academics

Category:- Physics
Reference No.:- M91709950

Have any Question?Write your Review or question?

Related Questions in Physics

Question a simple pendulum oscillates with frequency fa

Question: A simple pendulum oscillates with frequency f. a) what is its frequency if the entire pendulum accelerated 0.43 g upward? b) what is its frequency if the entire pendulum accelerates 0.43 g downwards? The respon ...

Question somebody on reddit posted a ridiculous picture

Question: Somebody on reddit posted a ridiculous picture today of a fly pierced onto a needle of a cactus: Whilst the OP claims the picture to be real, several people doubted the fly could ever reach enough momentum to a ...

Question a projectile is fired with an initial speed of

Question: A projectile is fired with an initial speed of 49.6m/s at an angle of 41.2 degrees above the horizontal on a long flat firing range. A) Determine the maximum height reached by the projectile. B) Determine the t ...

Question a sensitive gravimeter at a mountain observatory

Question: A sensitive gravimeter at a mountain observatory finds that the free fall acceleration is 0.0075 m/s^2 less than that at sea level. What is the observatory's altitude? The response must be typed, single spaced, ...

Question pluto moves in a fairly elliptical orbit around

Question: Pluto moves in a fairly elliptical orbit around the sun. Pluto's speed at its closest approach of 4.43 *10^9 km is 6.12 km/s. What is Pluto's speed at the most distant point in its orbit, where it is 7.30 *10^9 ...

Question at t0 a grinding wheel has an angular velocity of

Question: At t=0 a grinding wheel has an angular velocity of 30.0rad/s . It has a constant angular acceleration of 27.0rad/s^2 until a circuit breaker trips at time t = 1.60s . From then on, it turns through an angle 433 ...

Question your roommate is working on his bicycle and has

Question: Your roommate is working on his bicycle and has the bike upside down. He spins the 62cm -diameter wheel, and you notice that a pebble stuck in the tread goes by three times every second. What is the pebble's sp ...

Question some passengers on an ocean cruise may suffer from

Question: Some passengers on an ocean cruise may suffer from motion sickness as the ship rocks back and forth on the waves. At one position on the ship, passengers experience a vertical motion of amplitude 1.2m with a pe ...

Question which statements about potential energy are

Question: Which statements about potential energy are correct? Select all that apply. a) The potential energy of a pair of interacting charged objects increases as the distance between them increases. b) Potential energy ...

Question in this problem you will derive two different

Question: In this problem you will derive two different formulas for the power delivered to a resistor. What is the power P supplied to a resistor whose resistance is R when it is known that it has a voltage V across it? ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Physics Expert