SSA Week 1 Post Test Physical

What does the strength of gravity between two objects depend upon?

• Mass & distance
• Mass & weight
• Gravity & inertia
• Inertia & mass

As the product of two objects' masses increases, the pull of gravity

• Increases
• Decreases
• Stays the same

Tags

NGSS.MS-PS2-4

What characteristics do magnetic substances have?

• They can give you a "shock" when you touch them
• They can push or pull objects without touching them
• They are always black and cold to touch
• They fall faster than other objects when you drop them

Tags

NGSS.3-PS2-3

Is the force of gravity acting on the bag of potatoes a contact or non-contact force?

• contact force
• non-contact force

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

George holds a magnet above a pile of paper clips. The paper clips move toward the magnet and stick to it before the magnet actually touches it.

A magnet is surrounded by _______, which applies a push or a pull to an object without actually touching it.

• a simple machine

• an electric current

• generator

• magnetic field

When a comet passes near the Sun, it experiences a force that causes it to change direction. What causes this force?

• the Sun's magnetism

• the Sun's electric charge

• the Sun's mass

• the Sun's temperature

Henry sets his keys on a wooden table. He then takes a powerful magnet and positions it below the table and the keys. He finds that he is able to drag the keys along the table by moving the magnet. This demonstrates that

• magnetic forces act on wooden objects

• gravitational forces are contact forces

• magnetic forces act a a distance

• gravity is proportional to mass

After walking across a carpeted floor in socks, Jim brings his finger near a metal doorknob and receives a shock. This shock demonstrates that

• electric forces can act at a distance

• electric forces require direct contact

• frictional forces require direct contact.

• frictional forces act at a distance

Which of the following claims is supported by the data?

• Gravitational forces increase as the masses of the two objects increase

• Gravitational forces are strongest between objects with identical masses.

• Gravitational forces are weakest when one object is more massive than the other.

• Gravitational forces can never exceed an upper limit, regardless of the masses.

A wheeled cart is moving to the right at a constant speed.  Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?

• Balanced Forces, Constant Speed
• Balanced Forces, Acceleration
• Unbalanced Forces, Constant Speed
• Unbalanced Forces, Acceleration

Tags

NGSS.MS-PS2-2