SIMPLE MOTION & REVIEW

A 747 jet, traveling at a velocity of 70. meters per second north, touches down on a runway. The jet slows to rest at the rate of 2.0 meters per second² . What is the total distance the jet travels on the runway as it is brought to rest.

• 1225 m

• 17.5 m

• 2450 m

• 140 m

A 747 jet, traveling at a velocity of 70. meters per second north, touches down on a runway. The jet slows to rest at the rate of 2.0 meters per second² . What is the direction of the acceleration of the jet as it comes to a rest?

• North

• South

• Up

• Down

Which two terms represent a vector quantity and the scalar quantity of the vector’s magnitude, respectively?

• acceleration & velocity

• weight & force

• speed & time

• displacement & distance

As the angle between two concurrent forces decreases, the magnitude of the force required to produce equilibrium

• decreases

• increases

• remains the same

If the sum of all the forces acting on a moving object is zero, the object will

• slow down and stop

• change the direction of its motion

• accelerate uniformly

• continue moving with constant velocity

A 30-kilogram boy exerts a force of 100 Newtons on a 50-kilogram object. The force that the object exerts on the boy is

• 0 N

• 100 N

• 980 N

• 1,500 N

The graph represents the displacement of an object moving in a straight line as a function of time. Over what time interval does the object have a positive constant velocity?

• 0 s - 4 s

• 4 s - 6 s

• 6 s - 8 s

• 8 s - 10 s

The graph represents the displacement of an object moving in a straight line as a function of time. What was the total displacement traveled by the object during the 10.0-second time interval?

• 0 m

• 8 m

• 16 m

• 24 m

The graph represents the displacement of an object moving in a straight line as a function of time. What is the average speed of the object from 0 s to 10 s?

• 0.80 m/s

• 2.4 m/s

• 0.75 m/s

• none of the above

The graph represents the displacement of an object moving in a straight line as a function of time. Over what time interval is the object at rest?

• 0 s - 4 s

• 4 s - 6 s

• 6 s - 10 s

• none of the above