Vector Components and Forces

What causes a moving object to change direction? 

• acceleration
• inertia
• velocity
• force

Tags

NGSS.HS-PS2-1

Which of the following is the tendency of an object to maintain its state of motion?

• acceleration
• inertia
• velocity
• force

A newton is equivalent to which of the following quantities?

• kg•m/s²
• kg•(m/s)²
• kg
• kg•m/s

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.

As an object falls toward Earth,

• Newton’s third law does not apply.
• the object does not exert a force on Earth.
• the object exerts a downward force on Earth.
• the upward acceleration of Earth is negligible because of its large mass.

A crate is released on a frictionless plank inclined at angle θ with respect to the horizontal. Which of the
following relationships is true? (Assume that the x-axis is parallel to the surface of the incline.)

• Fx= 0
• Fy= Fg
• Fy= Fx
• none of the above

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

In general, F_net equals

• F_n
• ΣF
• F_g
• F_f

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.