Resultant Forces and Components of Forces

What causes a moving object to change direction? 

• acceleration
• inertia
• velocity
• force

Tags

NGSS.HS-PS2-1

A newton is equivalent to which of the following quantities?

• kg•m/s²

• kg•(m/s)²

• kg

• kg•m/s

Tags

NGSS.HS-PS2-1

A free-body diagram represents all of the following except

• forces as vectors
• forces exerted by the object.
• the object
• forces exerted on the object.

The free-body diagram represents a car being pulled by a towing cable. In the diagram, which
of the following is the gravitational force acting on the car?

• 5800
• 13 690
• 14 700
• 13 690 - 14 700   = -1110

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

The free-body diagram shown above represents a car being pulled by a towing cable towards the left. In the diagram, the 5800 N force is

• he backward force the road exerts on the car.
• the gravitational force acting on the car.
• the force exerted by the towing cable on the car.
• the frictional force the road exerts on the car.

Tags

NGSS.HS-PS2-1

A single force acts on an object. The components of this force act along the + x-axis and the – y-axis. The single force that will bring the object into equilibrium has components that act along the

• +x-axis and −y-axis

• −x-axis and −y-axis

• +x-axis and +y-axis.

• −x-axis and +y-axis.

Tags

NGSS.HS-PS2-1

A car goes forward along a level road at constant velocity. The additional force needed to bring the car into equilibrium is

• the normal force times the coefficient of kinetic friction
• greater than the normal force times the coefficient of static friction.
• zero
• equal to the normal force times the coefficient of static friction.

A late traveler rushes to catch a plane, pulling a suitcase with a force directed 30.0° above the horizontal. If the horizontal component of the force on the suitcase is 60.6 N, what is the force exerted on the handle?

• 95.6
• 53.0
• 70.0
• 65.2

Tags

NGSS.HS-PS2-1

The length of a force vector represents the ______ of the force

• direction
• magnitude
• type
• cause

A person carrying a tray with a platter on it tips the tray at an angle of 12° below the horizontal. If the gravitational force on the platter is 5.0 N, what is the magnitude of the force parallel to the tray that tends to cause the platter to slide down the tray? (Disregard friction.)

• 5.0

• 4.9

• 1.0

• 0.42

Tags

NGSS.HS-PS2-1