Physics Midterm Review

If an object is at rest, what is its initial velocity?

• 0 m/s

• 5 m/s

• 10 m/s

• 15 m/s

What is the relationship between distance, speed, and time?

• @@ ext{distance} = ext{speed} imes ext{time}@@

• @@ ext{speed} = ext{distance} + ext{time}@@

• @@ ext{time} = rac{ ext{distance}}{ ext{speed}}@@

• @@ ext{distance} = ext{time} - ext{speed}@@

What is the formula for calculating the slope of a line?

• @@ ext{slope} = rac{ ext{rise}}{ ext{run}}@@

• @@ ext{slope} = rac{ ext{run}}{ ext{rise}}@@

• @@ ext{slope} = ext{rise} + ext{run}@@

• @@ ext{slope} = ext{rise} - ext{run}@@

What is the unit of acceleration?

• meters per second squared (m/s²)

• kilometers per hour (km/h)

• meters per second (m/s)

• feet per second squared (ft/s²)

If a box has a mass of 2 kg and experiences a net force of 20 N, what is its acceleration?

• 5 m/s²

• 10 m/s²

• 15 m/s²

• 20 m/s²

What is the velocity of an object that falls for 4 seconds under gravity?

• -30 m/s

• -40 m/s

• -50 m/s

• -20 m/s

How do you find the velocity of an object using an x vs. t graph?

• Calculate the slope of the graph using the formula: @@v = \frac{x_2 - x_1}{t_2 - t_1}@@

• Measure the area under the graph

• Determine the y-intercept of the graph

• Count the number of points on the graph

What does a negative velocity indicate?

• A negative velocity indicates that the object is moving in the opposite direction to the defined positive direction.

• A negative velocity indicates that the object is at rest.

• A negative velocity indicates that the object is accelerating positively.

• A negative velocity indicates that the object is moving faster than the speed of light.

What is the difference between speed and velocity?

• Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

• Speed and velocity are the same; both refer to how fast an object is moving.

• Velocity is a scalar quantity that refers to how fast an object is moving, while speed is a vector quantity that includes both speed and direction.

• Speed is a vector quantity that includes both speed and direction, while velocity is a scalar quantity that refers to how fast an object is moving.

What is the formula for calculating velocity?

• @@v = rac{x_2 - x_1}{t_2 - t_1}@@

• @@v = rac{d}{t}@@

• @@v = a imes t@@

• @@v = rac{m}{t}@@