Exam 2: Motion

A projectile's vertical velocity component

An automobile traveling on a straight, level road at 25 km/h speeds up to 70 km/h in 20 s. What was the magnitude of the auto's acceleration, in meters per second squared?

The rate at which an object's velocity changes with time is called its

Physics deals with force, energy, motion, and ______________.

Which one of the following is true for deceleration?

An object moving in a circle with a constant speed has a(n) ______________ directed toward the center of the circle.

An acceleration may result from

At the maximum height of a projectile launched at an angle to the horizontal, the projectile's velocity is in a ______________ direction.

______________ acceleration is necessary for uniform circular motion.

An object is dropped (g = 9.80 m/s²) and falls for 5.00 s before hitting the ground. a. How far has the object fallen? b. What is the final velocity? c. What is the final acceleration?

Velocity is similar to speed, but a ________ is also involved in velocity.

The following data refer to a car traveling west: t (s) 0 1 2 3 4 -------------------------- v (m/s) 30 25 20 15 10 ​ Find the magnitude and direction of the acceleration.

For there to be an acceleration, there must necessarily be a change in ______________.

An automobile's acceleration cannot be changed by using the

For an object in uniform circular motion, the acceleration points toward ______________.

What is the displacement of a hiker who travels 3.0 km east and then 4.0 km north?

A compass registers ______________.

In projectile motion, which of the following is not constant?

An object in uniform circular motion has

The following are data for an accelerating car: t (s) 0 5 10 15 20 ------------------------ v (m/s) 0 3 6 9 12 a. Is this car undergoing uniform acceleration? b. If so, what is the acceleration?