Onramps Physics

The law of universal gravitation states that any two objects in the uni-verse that have mass, without exception,

• attract each other.

• repel each other.

• combine to provide a balanced force.

• create friction

Tags

NGSS.MS-PS2-4

According to the law of conservation of momentum, when two objects collide in the absence of outside forces,

• velocity decreases

• velocity increases

• the objects have the same momentum before and after they collide.

• the objects have more momentum after they collide than they did before.

Tags

NGSS.HS-PS2-2

According to Newton’s third law of motion, when a hammer strikes and exerts force on a nail, the nail

• creates a friction with the hammer.

• disappears into the wood.

• exerts an equal and opposite force on the hammer.

• moves at a constant speed.

Tags

NGSS.MS-PS2-1

The overall force on an object after all the forces are added together is called the

• balanced force

• unbalanced force

• net force

• centripetal force

Tags

NGSS.MS-PS2-2

A student creates a parallel circuit that has three branches. The student places a resistor on each branch of the circuit so that each path has only one resistor. The student collected some of the electrical measurements in the circuit and recorded them below.

Based on the information above, which values should replace the A, B, and C in the Student Circuit Data table?

• A= 3 ohms

  B= 4.5 Amps

  C= 24 Volts

• A= 9 Volts

  B= 9 ohms

  C= 3 Amps

• A= 9 ohms

  B= 4.5 Amps

  C= 3 Volts

• A= 3 Volts

  B= 9 ohms

  C= 24 Amps

A student connects a length of unknown material in series with a battery and an ammeter (which measures current flow). When the circuit is complete, the ammeter reads that no current is flowing. The unknown material is most likely ​ ​ (a)  

• an insulator

• a conductor

• a superconductor

• a semiconductor

According to Newton’s third law of motion, the strength of a reaction force is ____________________ the strength of the action force.

• equal to

• negative to

• positive to

• greater than

Tags

NGSS.MS-PS2-1

A skydiver with a mass of 70 kg accelerates to Earth at a rate of 9.8 m/s2 due to gravity. What is the force on the skydiver?

• 79.8 Newtons

• 7.14 Newtons

• 0.14 Newtons

• 68.60 Newtons

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What happens when two forces act in the same direction?

• They cancel each other out.

• The stronger one prevails.

• Their strengths are added.

• Their sum divided by two is the total force.

Tags

NGSS.MS-PS2-2

The greater the mass of an object,

• the easier the object starts moving.

• the greater its inertia.

• the more balanced it is.

• the more space it takes up.

Tags

NGSS.MS-PS2-2