PHYS 407 Exam 1A

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the acceleration of Dominic when he brakes from 20 m/s to 10 m/s over 2 seconds?

5 m/s²

-5 m/s² (correct)

-15 m/s²

15 m/s²

At what time does the cart have a velocity of 15 m/s according to the provided graph?

3.0 s

2.0 s

There's no indication of 15 m/s in the graph. (correct)

1.5 s

How far does the cart travel according to the graph mentioned?

30 m (correct)

0 m

40 m

4 m

What is the total displacement of the cart based on the graph?

0 m (C) Signup and view all the answers

What is the velocity of a ball thrown upwards at 2 m/s when it lands back in your hand?

-2 m/s (A) Signup and view all the answers

When do the objects represented in the graph have the same speed?

At t0 (B) Signup and view all the answers

If a cart speeds up while moving towards the origin, what do the position and velocity graphs look like?

The position graph decreases while the velocity graph is increasing. (C) Signup and view all the answers

What does the acceleration graph look like for a ball rolling up a ramp and then back down?

Positive acceleration when going up and negative acceleration when coming down. (A) Signup and view all the answers

What is the initial speed of the ball released by Dalton in meters per second?

23.5 m/s (B) Signup and view all the answers

How far down the field would the ball have landed if it was not caught?

52.6 meters (A) Signup and view all the answers

What is the necessary acceleration for the train's brakes to stop it?

4.2 m/s² (D) Signup and view all the answers

How high did Thielen need to jump to catch the ball at the goal line?

0.8 meters (B) Signup and view all the answers

If the train is moving at 50 mph, what is its speed in meters per second?

22.35 m/s (D) Signup and view all the answers

What minimum speed must you run to ensure you leap off the train at 9 m/s relative to the ground?

20 m/s (C) Signup and view all the answers

What is the slope of the track indicated by a 5% grade?

2.86 degrees (D) Signup and view all the answers

What angle did Dalton release the ball relative to the horizontal?

20° (C) Signup and view all the answers

Flashcards

Acceleration

The rate of change of velocity over time. It is measured in meters per second squared (m/s²).

Velocity

The rate of change of position over time. It is measured in meters per second (m/s).

Distance

The total path length traveled by an object.

Displacement

The change in position of an object. It is a vector quantity, meaning it has both magnitude and direction.