Scalars and Vectors Classwork

A scalar quantity have only magnitude.

• True

• False

A vector quantity have magnitude and ...

• 1 scalar, 2 vectors

• 1 vector, 2 scalars

• 3 scalars

• three vectors

The diagram shows a resultant force and its horizontal and vertical components.

The horizontal component is 20.0 N and θ = 30°. What is the vertical component?

• 8.7 N

• 10.0 N

• 11.5 N

• 17.3 N

A force 5.0 N pushes a ball due North and another force of 3.0 N pushes it due east.

What is the magnitude of the net force acting on the ball?

• 2.8 N

• 4.0 N

• 5.8 N

• 8.0 N

What is the component of this displacement vector in the direction XY?

• 3.0 km

• 4.0 km

• 5.0 km

• 6.6 km

A vector has magnitude R and perpendicular components P and Q, as shown in the diagram.

Which expression correctly describes the vertical component?

• Q

• P

• R cosθ

• R sinθ

A force of 7.5 N acts at at 40° to the horizontal, as shown.

Calculate the component of the force that acts horizontally in 2 significant figures.

A force of 7.5 N acts at at 40° to the horizontal, as shown.

Calculate the component of the force that acts vertically in 2 significant figures.