From his house, Jack bikes at a constant velocity of 8.5 m/s {east} for 40 seconds....
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From his house, Jack bikes at a constant velocity of 8.5 m/s {east}
for 40 seconds....
Chris has two options for getting from school to his house. In this problem, we will...
Chris has two options for getting from school to his house. In this problem, we will model the entire trajectory as one-dimensional motion. The distance from school to Chris's house is 20.0km. The first choice involves riding a bicycle at a constant velocity of 10 m/s avoiding any traffic. The second choice involves driving a car taking the following steps: First he drives at a constant velocity at 8m/s for 6.0km. He then stops for 5 minutes due to a...
6) Jack accelerates a 7.2 m/s. He jumps with a vertical velocity of 6.8 m/s. There...
6) Jack accelerates a 7.2 m/s. He jumps with a vertical velocity of 6.8 m/s. There is a 5.7 m hole he is trying to jump over. Jack has a mass of 62 kg. a. What is the minimum horizontal velocity Jack has to be traveling at to clear the hole? b. How much of a run-up does Jack need to achieve this? c. How much force, in a horizontal direction, does Jack exert to produce his acceleration?
A whale swims at a constant velocity of 15 m/s southeast for 10 seconds, slows to...
A whale swims at a constant velocity of 15 m/s southeast for 10 seconds, slows to a stop at a rate of 3 m/s^2, and then accelerates northwest at a rate of 2 m/s^2 for 5 seconds. (a) sketch the velocity versus time t for the entire motion. Assume the motion started at time t=0 seconds; (b) how long did the motion described last?; (c) find an expression of the whale's velocity as a function of time for the entire...
A car accelerates from rest at S m/s for 5 seconds. It moves with a constant...
A car accelerates from rest at S m/s for 5 seconds. It moves with a constant velocity for 15 seconds, and then decelerates at 5 m/s to come to rest in 5 seconds. The entire journey takes 25 seconds. Plot the velocity-time graph of the motion AND determine the total distance the car travelled. (10 pts.) 4.
1. An object is originally moving in the +x direction at 16 m/s and a constant...
1. An object is originally moving in the +x direction at 16 m/s and a constant acceleration is applied to it. When it is at a displacement of 7 meters in the +x direction it is moving in the -x direction at 6 m/s. What is the acceleration of the object in m/s2? If in the -x direction, include a negative sign. 2. An object travels in the +x direction for 6 meters for 3.4 seconds and then, immediately, changes...
A dolphin swims at a constant velocity of 15 m/s southeast for 10 seconds, slows to...
A dolphin swims at a constant velocity of 15 m/s southeast for 10 seconds, slows to a stop at a rate of 3 m/s^2, and then accelerates northwest at a rate of 2 m/s^2 for 5 seconds. (a) sketch the acceleration as a function of time; (b) find an expression for the dolphin's average velocity over any time interval [0,t] during the motion; (c) find the expression fo the dolphin's displacement as a function of time; and (d) sketch the...
An object is originally moving at 3.5 m/s in the negative x direction with a constant...
An object is originally moving at 3.5 m/s in the negative x direction with a constant acceleration of 2.4 m/s2 in the negative x direction for 5.1 seconds. Then (immediately) a constant acceleration is applied to in the positive x direction. After some time, the average velocity for the entire trip is 0 m/s., and at that time, the object is moving at 61.2 m/s in the positive x direction. How long was the acceleration applied in the positive x...
(20 points) A car starting from rest travels 220 m in 9.4 seconds with a constant acceleration. It then travels at a con...
(20 points) A car starting from rest travels 220 m in 9.4 seconds with a constant acceleration. It then travels at a constant speed for another 12 seconds. After that, the brakes are applied and the car comes to rest an acceleration of 6.5 m/s2. A) Draw the motion diagram for the entire trip. B) What direction is the acceleration when the car is coming to rest? C) List all known variables with their values. D) What is the acceleration...
A train moving east with an initial velocity of 0.500 m/s speeds up at 2.00 m/s...
A train moving east with an initial velocity of 0.500 m/s speeds up at 2.00 m/s for 20.0 seconds, then moves at constant velocity for 100. seconds and finally slows down to a stop during the final 30.0 seconds. (10 points) a. Sketch a position versus time graph for the train #1 2 Sketch a velocity versus time graph for the train use c. What was the acceleration as it slowed? d. What was the net displacement during the 150...
During 9.85 seconds a motorcyclist changes his velocity from vx 38.5 m/s and vy 12.7 m/s...
During 9.85 seconds a motorcyclist changes his velocity from vx 38.5 m/s and vy 12.7 m/s to vax -22.1 m/s and v2y 29.7 m/s. Find the components of the motorcycle's average acceleration during this process, awx and avy. Number m/ s Number m/ s
6) Jack accelerates a 7.2 m/s. He jumps with a vertical velocity of 6.8 m/s. There is a 5.7 m hole he is trying to jump over. Jack has a mass of 62 kg. a. What is the minimum horizontal velocity Jack has to be traveling at to clear the hole? b. How much of a run-up does Jack need to achieve this? c. How much force, in a horizontal direction, does Jack exert to produce his acceleration?
A car accelerates from rest at S m/s for 5 seconds. It moves with a constant velocity for 15 seconds, and then decelerates at 5 m/s to come to rest in 5 seconds. The entire journey takes 25 seconds. Plot the velocity-time graph of the motion AND determine the total distance the car travelled. (10 pts.) 4.
A train moving east with an initial velocity of 0.500 m/s speeds up at 2.00 m/s for 20.0 seconds, then moves at constant velocity for 100. seconds and finally slows down to a stop during the final 30.0 seconds. (10 points) a. Sketch a position versus time graph for the train #1 2 Sketch a velocity versus time graph for the train use c. What was the acceleration as it slowed? d. What was the net displacement during the 150...
During 9.85 seconds a motorcyclist changes his velocity from vx 38.5 m/s and vy 12.7 m/s to vax -22.1 m/s and v2y 29.7 m/s. Find the components of the motorcycle's average acceleration during this process, awx and avy. Number m/ s Number m/ s
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