FIRE EMERGENCY A girl of mass 48.0 kg is rescued from a building fire by leaping into a firefighters' net. The window from which she leapt was 12.0 m above the net. She lands in the net so that she is brought to a complete stop in 0.45 s. During this interval (a) What is his change in momentum? (b) What is the impulse on the net due to the girl? (c) What is the average force on the net due to the girl?

FIRE EMERGENCY A girl of mass 48.0 kg is rescued from a building fire by leaping into a firefighters' net. The window from which she leapt was 12.0 m above the net. She lands in the net so that she is brought to a complete stop in 0.45 s. During this interval (a) What is his change in momentum? (b) What is the impulse on the net due to the girl? (c) What is the average force on the net due to the girl?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter3: Motion In Two Dimensions

Section: Chapter Questions

Problem 42P: A landscape architect is planning an artificial waterfall in a city park. Water flowing at 1.70 m/s...

See similar textbooks

Similar questions

A "happy ball" was dropped from an initial height of 1m as it bounced back up to a maximum height of .58 meters. When a "sad ball" was dropped from an initial height of 1m, the ball didnt bounce. Both balls have a mass of 9.5 grams. Can you please help me calculate the velocity of the "happy ball" just before and after hitting the ground using kinematics equations? Thank you in advance.
A landscape architect is planning an artificial waterfall in a city park. Water flowing at 1.70 m/s will leave the end of a horizontal channel at the top of a vertical wall h = 2.35 m high, and from there it will fall into a pool (Fig. P3.42). (a) Will the space behind the waterfall be wide enough for a pedestrian walkway? (b) To sell her plan to the city council, the architect wants to build a model to standard scale, which is one-twelfth actual size. How fast should the water flow in the channel in the model? Figure P3.42
1. Given velocities of two identical billiard balls just before impact, determine post- impact velocity of each ball. COR = 0.92. Ignore effects of friction. V82 %3D A 35° 75° 30 ft/s 40 ft/s
Can you also help w C? C: Determine the direction of the velocity of the sandbag at a time 0.285 ss after its release. TIA
As part of their training in BT, a 57kg cadet jumps in TS OCA. What is his velocity before hitting the water which is approximately 15m from the railing of the ship? 9.8m/s Om/s -294 m/s -17.15m/s -17.5m/s
nt. 8. A cannonball is shot from a cannon at 45-degree angle: a. In Galeleo's Kinetic equations, which variable must be constant for the equations to give the correct results? b. If the x axis represents the horizonal axis, what is the value of ax? C. Assuming there was no air resistance, would final velocity of the cannonball be (1) greater than initial velocity, (2) less than initial velocity, or (3) the same as initial velocity when is at its maximum height? d. Assuming there was air resistance, would final velocity of the cannonball be (1) greater than initial velocity, (2) less than initial velocity, or (3) the same as initial velocity when is at its maximum height?
Human reaction time is usually about 0.18s. If your lab partner holds a ruler between your finger and thumb and releases it without warning, how far can you expect the ruler to fall before you catch it? The nearest value is a. 32cm b. 88cm c. 1.6cm d. 180cm e. 16cm
A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.830 m/s at an angle of 39.0° above the table, and it lands on the magazine 0.0690 s after leaving the table. Ignore air resistance. How thick is the magazine? Express your answer in millimeters. Number i Save for Later Units Attempts: 0 of 1 used Submit Answer
Your frined drops a tennis ball from her window (66.1 m above the ground). One second later you throw a rock(as a projectile) from the ground. The rock and the ball collide at x=32.6m, y=22 m measured from where the rock was thrown. a.) Determine how many second after the tennis ball is released the collision takes place. b.) Determine the velocity of the tennis ball at the time of the collision with the rock. c.) Determine the initial velocity of the rock in its component form.
Find the magnitude of 0B.ds for the closed path (b )shown in the figure: 05 A 1 A ®2 A Select one: a. 3u. (T.m) b. -1 H. (T.m) C. 0 d. 4Ho (T.m)
A rock of mass 0.5 kg is shot straight up in the air at 3 ms 1 from the top of a cliff 20 m high. a) Draw a picture of the situations along with an appropriate coordinate system of your choice. b) Using COE, determine how far above the top of the cliff the rock goes before beginning to fall back down. c) Using COE, determine how fast is the rock moving when it hits the ground at the bottom of the cliff.
A man stands on the roof of a 15.0-m-tall building and throwsa rock with a speed of 30.0 m/s at an angle of 33.0 above the horizontal.Ignore air resistance. Calculate Draw x-t, y-t, vx-t, and vy-t graphs for the motion.