You and a friend climb to the top of a tall snow-covered hill. You take your sled down the steeper side of the hill while your friend takes the more gentle slope. Ignoring friction and air resistance, who is moving faster at the bottom of the hill? FRIEND 30° 60° O You are moving faster. O Your friend is moving faster. O You are both moving at the same speed. There is not enough information to tell.

You and a friend climb to the top of a tall snow-covered hill. You take your sled down the steeper side of the hill while your friend takes the more gentle slope. Ignoring friction and air resistance, who is moving faster at the bottom of the hill? FRIEND 30° 60° O You are moving faster. O Your friend is moving faster. O You are both moving at the same speed. There is not enough information to tell.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter2: One Dimensional Motion

Section: Chapter Questions

Problem 15PQ: A train leaving Albuquerque travels 293 miles, due east, to Amarillo. The train spends a couple of...

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A train leaving Albuquerque travels 293 miles, due east, to Amarillo. The train spends a couple of days at the station in Amarillo and then heads back west 107 miles where it stops in Tucumcari. Suppose the positive x direction points to the east and Albuquerque is at the origin of this axis. a. What is the total distance traveled by the train from Albuquerque to Tucumcari? b. What is the displacement of the train for the entire journey? Give both answers in appropriate SI units.
A fish swimming in a horizontal plane has velocity vi=(4.00i+1.00j)m/s at a point in the ocean where the position relative to a certain rock is ri=(10.0i4.00j)m. After the fish swims with constant acceleration for 20.0 s, its velocity is v=(20.0i5.00j)m/s. (a) What are the components of the acceleration of the fish? (b) What is the direction of its acceleration with respect to unit vector i? (c) If the fish maintains constant acceleration, where is it at t = 25.0 s and in what direction is it moving?
Tadeh launches a model rocket straight up from his backyard that takes 4.50 s to reach its maximum altitude. (After launch, the rockets motion is only influenced by gravity.) a. What is the rockets initial velocity? b. What is the maximum altitude reached by the rocket?
During the battle of Bunker Hill, Colonel William Prescott ordered the American Army to bombard the British Army camped near Boston. The projectiles had an initial velocity of 45 m/s at 35 above the horizon and an initial position that was 35 m higher than where they hit the ground. How far did the projectiles move horizontally before they hit the ground? Ignore air resistance.
A race car travels 825 km around a circular sprint track of radius 1.313 km. How many times did it go around the track?
Pete and Sue, two reckless teenage drivers, are racing eastward along a straight stretch of highway. Pete is traveling at 98.0 km/h, and Sue is chasing him at 125 km/h. a. What is Petes velocity with respect to Sue? b. What is Sues velocity with respect to Pete? c. If Sue is initially 325 m behind Pete, how long will it take her to catch up to him?
A delivery man starts at the post office, drives 40 km north, then 20 km west, then 60 km northeast, and finally 50 km north to stop for lunch. Use the analytical method to determine the following: (a) Find his net displacement vector. (b) How far is the restaurant from the post office? (c) If he returns directly from the restaurant to the post office, what is his displacement vector on the return trip? (d) What Is his compass heading on the return trip? Assume the +x-axis is to the east.
While strolling downtown on a Saturday Afternoon, you stumble across an old car show. As you are walking along an alley toward a main street, you glimpse a particularly stylish Alpha Romeo pass by. Tall buildings on either side of the alley obscure your view, so you see the car only as it passes between the buildings. Thinking back to your physics class, you realize that you can calculate the cars acceleration. You estimate the width of the alleyway between the two buildings to be 4 m. The car was in view for 0.5 s. You also heard the engine rev when the car started from a red light, so you know the Alpha Romeo started from rest 2 s before you first saw it. Find the magnitude of its acceleration.
A During the battle of Bunker Hill, Colonel William Prescott ordered the American Army to bombard the British Army camped near Boston. The projectiles had an initial velocity of v measured in meters per second at an angle above the horizon and an initial position that was h higher than where they hit the ground. How far did the projectiles move horizontally before they hit the ground? Ignore air resistance.
A softball is hit with an initial velocity of 29.0 m/s at an angle of 60.0 above the horizontal and impacts the top of the outfield fence 5.00 s later. Assuming the initial height of the softball was 0.500 m above (level) ground, what are the balls horizontal and vertical displacements?
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A rock is thrown horizontally off a 56.0-m-high cliff overlooking the ocean, and the sound of the splash is heard 3.60 s later. If the speed of sound in air at this location is 343 m/s, what was the initial velocity of the rock?