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The driver of a pickup truck is traveling north at 20m/sec and suddenly stops. In which direction will a suitcase lying in the back of the truck move?
A parked car.
Velocity
10N
The car is increasing its speed.
The object remains stationary.
Toward the front.
The forces are balanced, but then line B exerts a greater force, causing unbalanced forces.
Unbalanced forces
What causes objects to move?
A parked car.
Velocity
10N
The car is increasing its speed.
The object remains stationary.
Toward the front.
The forces are balanced, but then line B exerts a greater force, causing unbalanced forces.
Unbalanced forces
Two equal forces act at the same time on the same stationary object but in opposite directions. Which statement describes the object's motion?
A parked car.
Velocity
10N
The car is increasing its speed.
The object remains stationary.
Toward the front.
The forces are balanced, but then line B exerts a greater force, causing unbalanced forces.
Unbalanced forces
A student pushes against a tree with a force of 10 newtons (N). The tree does not move. What is the amount of force exerted by the tree on the student?
A parked car.
Velocity
10N
The car is increasing its speed.
The object remains stationary.
Toward the front.
The forces are balanced, but then line B exerts a greater force, causing unbalanced forces.
Unbalanced forces
A car moves along a road that has markers every kilometer. Over time, the car passes the markers in shorter periods of time. Which statement best describes the motion of the car?
A parked car.
Velocity
10N
The car is increasing its speed.
The object remains stationary.
Toward the front.
The forces are balanced, but then line B exerts a greater force, causing unbalanced forces.
Unbalanced forces
Which of the below statements is not an example of acceleration?
A parked car.
Velocity
10N
The car is increasing its speed.
The object remains stationary.
Toward the front.
The forces are balanced, but then line B exerts a greater force, causing unbalanced forces.
Unbalanced forces
Two football linemen push against each other in practice. They do not move, but then lineman B moves forward and lineman A moves backward. Why does this happen?
A parked car.
Velocity
10N
The car is increasing its speed.
The object remains stationary.
Toward the front.
The forces are balanced, but then line B exerts a greater force, causing unbalanced forces.
Unbalanced forces
An airplane is cruising at a speed of 120 knots toward the east and then curves south. The airplane has changes its what?
A parked car.
Velocity
10N
The car is increasing its speed.
The object remains stationary.
Toward the front.
The forces are balanced, but then line B exerts a greater force, causing unbalanced forces.
Unbalanced forces
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