Physics, 13.02.2020 00:15 573589

It's physical science

Respond to the following based on your reading.

1. Differentiate between speed and velocity.

2. Using examples to describe each term, differentiate among average, instantaneous, and uniform velocity.

Solve each problem.

3. A driver of a car hits its brakes and begins to decelerate. If the velocity changes from 60 m/s to 20 m/s in 6 s, what is the deceleration of the car?

4. A researcher observes a vehicle with an initial velocity of 14 m/s. The vehicle accelerates uniformly with an acceleration of 3 m/s2. After 6 seconds, what is the velocity of the vehicle?

5. It takes you 5 hours to complete a 375-kilometer trip. What was your average speed on this trip?

6. Henry takes a boat ride for 15 minutes to reach his destination. If the boat was traveling at 6 meters/second, how far did the boat travel?

7. A storm is moving east towards your house at an average speed of 35 km/hr. If the storm is currently 80 kilometers from your house, in how much time do you expect it to arrive?

8. If the velocity of an object changes from 15 m/s to 50 m/s during a time interval of 4 s, what is the acceleration of the object?

9. If the acceleration in question 8 is constant, what's the average velocity of the object described?

10. A van is traveling at 11.5 m/s. To avoid hitting a deer, the brakes are applied, and the van stops within 3.5 seconds. What is the acceleration?

Answers: 1

Show answers

Another question on Physics

Physics, 21.06.2019 22:00

Jason and mia are both running in a race. as they approach the finish line, you being the physicist that you are decide to time how long it takes them to reach the end of the race. when you start your stop watch (you can take this as time t = 0 s) you notice that mia is an unknown distance d ahead of jason and both are moving with the same initial velocity v_0. you also notice that jason is accelerating at a constant rate of a_j, while mia is deaccelerating at a constant rate of -a_m. jason and mia meet each other for the first time at time t = t_1. at this time (t = t_1) jason's velocity is two times that of mia's velocity, meaning v_j (t_1) = 2v_m (t_1). a) draw the position vs. time graph describing mia's and jason's motion from time t = 0 to time t = t_1. clearly label your axes and initial conditions on your graph. b) draw the velocity vs. time graph describing mia and jason's motion from time t = 0s to time t = t_1. clearly label your axes and initial conditions on your graph. c) how long from when the stop watch was started at t = 0s did it take mia and jason to meet? express your answer in terms of know quantities v_0, a_m, and a_j. d) when the stop watch started at time t = 0s, how far apart, d, were mia and jason? express your answer in terms of know quantities v_0, a_m, and a_j.

Answers: 1

Answer

Physics, 22.06.2019 00:30

During spring semester at mit, residents of the parallel buildings of the east campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. a balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. assume that the stretching of the hose obeys hooke's law with a spring constant of 89.0 n/m. if the hose is stretched by 5.80 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length? unitst 3 number-1497 the tolerance is +/-5% open show work click if you would like to show work for this question:

Answers: 2

Answer

Physics, 22.06.2019 07:30

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?

Answers: 1

Answer

Physics, 22.06.2019 10:00

What is the temperature in degrees celsius of a substance with a tempature of 49k

Answers: 2

Answer

You know the right answer?

It's physical science

Respond to the following based on your reading.

1. Di...

Questions

Physics, 24.09.2019 14:30

Seth has always been very interested in railway systems. since he was young he was fascinated with types of trains, train routes, train museums, and r...