Spring Semester Test 2024

The higher an object is, the _______________ its gravitational potential energy.

• greater
• less
• less stable
• more fluid

Tags

NGSS.MS-PS3-2

When all the forces on a skydiver are ________________, he falls at terminal velocity.

• balanced
• unbalanced
• nonzero
• strong

Tags

NGSS.MS-PS2-2

The SI unit for weight is

• Newton
• gram
• pound
• kilogram

The factors that affect the strength of the gravitational force on an object are

• the mass of each object and the distance between them.
• type pf surfaces and how hard they are pressed together
• weight of each object and the friction between them
• mass and weight of each object

Tags

NGSS.MS-PS2-4

When an object moves through the air, fluid friction acting on the object is

• air resistance
• gravity
• inertia
• terminal velocity

_________________ friction makes objects slow down and stop.

• Sliding
• Rolling
• Fluid
• Static

If similar materials are used, _________________ friction is much easier to overcome than sliding friction.

• rolling
• static
• fluid
• none of these choices are correct

Sliding friction between two very smooth surfaces is

• rolling friction
• static friction
• fluid friction
• none of these choices are correct

Friction acts in a direction ____________ the direction of the object's motion.

• opposite to
• the same as
• parallel to
• perpendicular

Friction ______________ as surfaces push harder against each other.

• increases
• decreases
• stays the same
• is negligible