Resultant forces and components

What causes a moving object to change direction? 

• acceleration
• inertia
• velocity
• force

Remember, do a diagram if you think it will help:

A body is acted on by a vertical force of 18 N and a horizontal force of 32 N.

The angle to the horizontal of the resultant force is given by

If vector A has an x component of 12 units and a y component of 7 units, what is the magnitude of vector A?

• 19 units

• 13 units

• 14 units

• 193 units

Name two quantities that are vectors.

• force and speed
• speed and acceleration
• force and acceleration
• mass and weight

What are balanced forces?

• forces of the same size, in opposite directions
• the same size in the same direction
• forces in opposite directions
• forces at right angles to each other

What is the name for a single force on an object with the same effect as all the forces combined?

• big
• total
• resultant
• sum

Is the car

• Stationary
• Moving at constant speed
• Accelerating
• Decelerating

Is the car

• Stationary
• Moving at constant speed
• Accelerating
• Decelerating

Is the car

• Stationary
• Moving at constant speed
• Accelerating
• Decelerating

If a nonzero net force is acting on an object, then the object is definitely

• losing mass
• being accelerated.
• moving with a constant velocity
• at rest.