A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 2.90 s for the ball to reach its maximum height. (a) Find the ball's initial velocity. m/s upward (b) Find the height it reaches. m Enter a number A person walks flrst at a constant speed of 4.90 m/s along a straight line from point O to point ® and then back along the line from O to at a constant 1 (a) What is her average speed over the entire trip? 3.92 m/s (b) what is her average velocity over the entire trip? m/s

A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 2.90 s for the ball to reach its maximum height. (a) Find the ball's initial velocity. m/s upward (b) Find the height it reaches. m Enter a number A person walks flrst at a constant speed of 4.90 m/s along a straight line from point O to point ® and then back along the line from O to at a constant 1 (a) What is her average speed over the entire trip? 3.92 m/s (b) what is her average velocity over the entire trip? m/s

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter3: Motion Along A Straight Line

Section: Chapter Questions

Problem 61P: A woodpecker’s brain is specially protected from large accelerations by tendon-like attachments...

See similar textbooks

Similar questions

Calculate the height of a cliff if it takes 2.35 s for a rockto hit the ground when it is thrown straight up from the cliffwith an initial velocity of 8.00 m/s. (b) How long would it taketo reach the ground if it is thrown straight down with the samespeed
A hovercraft has an initial position of ⃗r(t = 0s) = 235m @ 265◦, an initial velocity of⃗v(t = 0s) = 125m/s @ 14◦, and a constant acceleration of ⃗a = 21.3m/s2 @ 143◦ How long does it take for the x coordinate of the hovercraft’s position to reach -100m What is the hovercraft’s speed at this time? What is the hovercraft’s acceleration at this time?
a parachutist opens his chute at time t=0, while falling vertically at a speed of 50.0 m/s. From the combined effects of gravity and air resistance, he is subject to anupward acceleration of ay= (40/T)e-t/T where T=6.8s. Find the parachutist's speed 10s after the chute is opened and the distance fallen during that period of time.
An inquisitive physics student and mountain climber climbs a 51.0-m-high cliff that overhangs a calm pool of water. He throws two stones vertically downward, 1.00 s apart, and observes that they cause a single splash. The first stone has an initial speed of 2.06 m/s. (b) What initial velocity must the second stone have if the two stones are to hit the water simultaneously?
On a 200 km bike cycle ride, you ride the first 90 km at an average speed of 20 m/s. What mustyour average speed over the next 40 km be to have your average speed for the total 200 km be?(a) 60 m/s?
A balloonist, riding in the basket of a hot air balloon that is rising vertically with a constant velocity of 17.0 m/s, releases a sandbag when the balloon is 20.1 m above the ground. Ignoring air resistance, what is the bag’s speed when it hits the ground? anser in m/s
Calculate the height (in m) of a cliff if it takes 2.27 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.07 m/s. (b) How long (in s) would it take to reach the ground if it is thrown straight down with the same speed?
A roofer tosses a shingle off a 240.1 m high roof, giving it an initial horizontal velocity of 10 m/s. How far from the building does the shingle land? What is the acceleration of the shingle as it leaves the roof at 2m/s^2?
My final velocity number is 20 m/s, my time is 19.05 s, my distance is n/a, my acceleration is 0.892 m/s2, so what is my initial velocity
Check Your Understanding A chunk of ice beaks off a glacier and falls 30.0 m before it hits the water. Assuming it falls freely (there is no air resistance), how bag does it take to hit the water? Which quantity increases faster, the speed of the Ice chunk or its distance traveled?
A woodpecker’s brain is specially protected from large accelerations by tendon-like attachments inside the skull. While pecking on a tree, the woodpecker’s head comes to a stop from an initial velocity of 0.600 m/s in a distance of only 2.00 mm. (a) Find the acceleration in meters per second squared and in multiples of g , where g=9.80m/s2 . (b) Calculate the stopping time. (c) The tendons cradling the brain stretch, making its stopping distance 4.50 mm (greater then the head and, hence, less acceleration of the brain). What is the brain’s acceleration, expressed in multiples of g ?
A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 175 mi/h in 2.50 s. (a) Find the average acceleration of the plane. (b) Modeling the acceleration as constant, find the distance the plane moves in this time interval.