PHYS 2.4 Formative

A bowling ball moves with constant velocity from an initial position of 1.6 m to a final position of 7.8 m in 3.1 s. At what time is the ball at the position 8.6 m?

• 3.5 s

• 3.1 s

• 2.0 s

• 6.2 s

The velocity of Car A is...

• greater than car B

• less than car B

• the same as car B

The initial posiiton (x_i) of Car A is...

• greater than car B

• less than car B

• the same as car B

Which of these is true at t=12 s?

• car A and car B have the same speed

• car B is moving faster than car A

• car A and car B have the same position

• car A is moving faster than car B

You catch up with your friend Bart at an airport by using the moving walkway. Your friend is 7.8m ahead of you moving with a speed of 2.3 m/s. Your speed is 4.2 m/s. If Bart stops walking 2.2s after you step onto the walkway, how long does it take you to catch him?

• 3.1 s

• 2.3 s

• 4.1 s

• 6.0 s

A straight line on a position-time (x-t) graph represents motion with a constant velocity. What does the slope of the line represent?

• initial position (x_i)

• velocity (v)

• time (t)

• final position (x_f)

A straight line on a position-time (x-t) graph represents motion with a constant velocity. What does y-intercept of the line represent?

• initial position (x_i)

• velocity (v)

• time (t)

• final position (x_f)

Two bicycles have the following equations of motion:
x₁ = -4.0 m + (2.5 m/s) t
x₂ = 6.7 m + (-3.5 m/s) t

Which bicycle has the greater speed?

• bicycle 1

• bicycle 2

Two bicycles have the following equations of motion:
x₁ = -4.0 m + (2.5 m/s) t
x₂ = 6.7 m + (-3.5 m/s) t

What is the distance (in meters) between the bicycles at t=0 s?

(a)  

The position of a ball as a function of time is given by
x = 3.0 m + (-5.0 m/s) t

What is the position of the ball (in meters) at t = 1.5 s?

(a)