2nd Sem Physical Science

When a heavy nucleus decays, it may emit?

• Alpha

• Beta

• Gamma

• All of the above

The strong nuclear force?

• Holds electrons together

• Holds atomic nucleus together

• Holds neutrons together

• Holds hands together

The process in which a heavy nucleus splits into two lighter nuclei is called?

• Fusion

• Fission

• Nuclear force

• Fishing

___________________ is a speed in a certain direction.

• Momentum

• Travelocity

• Velocity

• Vector

Any push or pull on an object.

• force
• velocity 
• inertia
• momentum

The force that opposes motion between two surfaces in contact with each other.

• inertia
• friction
• momentum
• gravity

When all the forces on an object are equal and opposite, & the net force is zero, that's...

• balanced forces
• unbalanced forces
• terminal velocity
• reaction forces

The combination of all the forces acting on an object is the...

• net force
• action force
• reaction force
• balance force

"An object in motion (or at rest) will to stay in motion (or at rest) until an outside force acts upon it."

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

Any change in an objects velocity is caused by?

• Unbalanced force

• Balanced force

• Negative force

• New Balance Force