2. A block is pushed up a frictionless plane with an initial speed vo and then released. The plane is inclined 30° above the horizontal. What is the approximate acceleration of the block at the instant that it reaches its highest point on the inclined plane? a. Zero b. 5 m/s? down the incline c. 10 m/s? down the incline d. 10 m/s? up the incline e. It cannot be calculated without knowing the value of Vo

2. A block is pushed up a frictionless plane with an initial speed vo and then released. The plane is inclined 30° above the horizontal. What is the approximate acceleration of the block at the instant that it reaches its highest point on the inclined plane? a. Zero b. 5 m/s? down the incline c. 10 m/s? down the incline d. 10 m/s? up the incline e. It cannot be calculated without knowing the value of Vo

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter2: Motion In One Dimension

Section: Chapter Questions

Problem 2.49P: It is possible to shoot an arrow at a speed as high as 100 m/s. (a) If friction can be ignored, how...

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5. A 500 kg roller coaster car is on a track. The top of the first hill is 90 m above the ground. After the first hill, there is a loop-the-loop which has its highest point at 50 m above the ground. What is the roller coaster's velocity at the highest point of the loop- the-loop?
8. A small object is placed at the top of an incline that is essentially frictionless. The object slides down the incline onto a rough horizontal surface, where it stops in 5.0 s after traveling 60 m. a. What is the speed of the object at the bottom of the incline and its acceleration along the horizontal surface? b. What is the height of the incline?
A car traveling at 20m/s is attempting to drive up an icy hill. When it getsonto the hill, it is able to go 10 meters before it hits some ice and begins sliding. Assume the hillis a 10 degree incline. A. How far up the hill does the car travel before it starts to slide back down? Make sure toinclude the initial 10 meters in your final distance. B. If the car then slides all the way back to the bottom of the hill, what is its speed when itgets to the bottom? Assume it doesn’t gain traction back, so it is sliding with no frictionthe whole way down.
It is possible to shoot an arrow at a speed as high as 100 m/s. (a) If friction can be ignored, how high would an arrow launched at this speed rise if shot straight up? (b) How long would the arrow be in the air?
A student at the top of a building of height h throws one ball upward with a speed of i and then throws a second ball downward with the same initial speed i. Just before it reaches the ground, is the final speed of the ball thrown upward (a) larger, (b) smaller, or (c) the same in magnitude, compared with the final speed of the ball thrown downward?
A ball starts from rest and accelerates at 0.5(H) m/s2 while moving down an inclined plane 9.00 m long. When it reaches the bottom, the ball rolls up another plane, where it comes to rest after moving 15.0 m on that plane. (a) What is the speed of the ball at the bottom of the first plane? (b) During what lime interval does the ball roll down the first plane? (c) What is the acceleration along the second plane? (d) What is the balls speed 8.00 m along the second plane?
4. Our second-to-last parachuting idiot (whose mass is 50okg) of the semester has jumped from a height of 20,000m. Her parachute is broken, obviously. Ignoring air resistance, how long will it take her to reach the Earth? At what speed would she hit the a. ground? b. She is subject to a linear air resistance term and a quadratic air resistance term. Which of these terms is likely to dominate? Why? C. Including air resistance, at what velocity will she strike the Earth? (Assume the coefficient to be 0.3Ns/m for quadratic or 0.3 Ns/m for linear, depending on your answer for part b.)
An object started to slide down from rest along an inclined surface with a net acceleration of 4.2 m/s². find the distance ( in units of m) covered by the object in 11.1 s. a d Select one: O A. 46.6 О В. 129.4 O C. 23.3 O D. 517.5 O E. 258.7
Q4. A stone was dropped from a cliff of height 100 m. Ignoring air resistance, how long will it take the stone to reach ground? juaiļ, o ú 49 49 =4 t -4.9t Q5. A stone was dropped from a cliff of height 100 m. Ignoring air resistance, what will be the final speed of the stone when it reaches ground? Q6. An object has an initial velocity of 8 m/s and acceleration of 2 m/s?, how far the object will move in 10 seconds?
A small rocket launched straight up. When at a height of 5.0km and velocity of 200.0 m/s, it is releases its booster and enters free fall. Neglecting air friction, 1. what is the velocity of the rocket at a height of 6.0km on its way up? A. 142 m/s B. 200 m/s C. 244 m/s D. 397 m/s 2. What is the maximum height, above the ground, the rocket attains? A. 2020m B. 5000m C. 7040m 3. Calculate the total time of flight between releasing its boosters and falling back and hitting the ground? A. 20.4a B. 40.8s C. 37.9s D. 58.3s