Chapter 2.1 Picturing motion

A car is moving with a uniform speed of 15.0m/s along a straight path. What is the distance covered by the car in 12.0 minutes?

• 108km
• .180km
• 10,800km
• 10.8km

A racehorse is running with a uniform speed of 69 km/hr along a straightaway. What is the time it takes for the horse to cover 400 meters?

• 21 seconds
• 2.1 minutes
• 0.35 hours
• 27.6 hours

Which of the following is a pair of vector quantities?

• Speed - Distance

• Velocity - Distance

• Velocity - Displacement

• Speed - Displacement

Which choice is a valid way to contruct a motion diagram?

• Add together the average speeds of the various objects in motion
• Take a series of photographs at equal time intervals of a moving object, perpendicular to the direction of motion; overlay the images to see how the position changes with time.
• Draw bectors to represent the speeds involved.
• Add vectors in a head-to-tail manner to determine the resultant vector.

The final position minus the initial position is the

• average velocity
• motion diagram
• distance
• displacement

In a chosen coordinate system, the position of an object in motion can have negative values.

• true
• false

The position-time graph of an object moving with a constant average velocity is always a straight line.

• true
• false

Which of the following does a particle model include? (2 correct choices)

• pictures of the object at its indicated location
• evenly spaced pictures of the object
• dots to represent the object and its location
• even time intervals between the dots

Which of the following statements describe constant motion? (2 correct choices)

• an object changes its postion more between each time interval
• an object changes its postion the same amount between each time interval
• the position vs time graph is linear
• the position vs time graph is parabolic

What are two ways to picturing motion?

• words

• motion diagram

• unorganized data

• Particle diagram