Phys M5 Test Review - Displacement and Forces in 2D

The resultant between 2 vectors can be found by placing the vectors

• tip to tip.

• tip to tail.

• tail to tail.

• tip to midpoint.

A wolf spider runs 75 cm west, then turns and runs 50 cm south. Which choice gives the correct solution for the resultant?

• R²=75²+50²

• R²=75²+50²-2(75)(50)cos(60)

• R²=75²-50²

• R²=75²-50²-2(75)(50)cos90

The static friction force is

• the force need to keep an object moving at a constant velocity across a surface.

• the force needed to bring an object to rest.

• the minimum force required to overcome static friction and move an object.

• equal to the net force.

Equilibrium can occur

• only if there is constant acceleration.

• only if the sum of the forces is zero.

• only if an object is motionless.

• only if the sum of the forces is greater than zero.

Which of the following forces does NOT act on an object sliding down an inclined plane?

• force of granity

• force of friction

• equilibrant force

• normal force

When adding 2 vectors together graphically, which of the following may be done?

• moving a vector

• rotating a vector

• changing the length of a vector

• changing the angle between the vectors

The normal force on an object always acts

• parallel to the surface upon which the object is resting.

• perpendicular to the surface upon which the object is resting.

• equal and opposite to the weight of the object.

• in the same direction as gravity.

If two vectors are at right angles to each other, the resultant can be found by using the ____________________.

A force that puts an object in equilibrium is called the ____________________.

The coefficient of ____________________ friction is greater than the coefficient of ____________________ friction.

• static, kinetic

• kinetic, static

• static, static

• kinetic, kinetic