Bethel Physics 5 Newton's Laws

2 forces acting on a system, 50 N to the left and 60 N to the right. What is the net force & acceleration?

results in a zero net force

Newton's laws of motion are workable in all known situations.

What is the mass of a 5000 N car?

The weight of an object on Pluto is the same as its weight on earth.

describes the relationship between force, mass, and acceleration

Who inductively suggested the idea of inertia?

Newton was the first person to introduce the concept of inertia.

involves action-reaction pairs

Which of the fundamental forces binds protons & neutrons together in the nucleus?

In which of the following cases would you expect Newton's laws to make accurate predictions?

results in an acceleration

Another term for mechanical force is

Which of the following is not a mechanical force?

Under ideal conditions, an object needs a continuous push to maintain a constant velocity.

Which is an example of a system on which unbalanced forces act?

a body at rest tends to remain at rest unless acted upon by an external force

A spring scale is an example of an instrument used to measure forces.

vector sum of simultaneous forces

causes a body to resist any change in its motion

A soccer player kicks a ball with 115 N downfield. What is the reaction, according to Newton's 3rd law?

A force accelerates mass A. The same force applied to mass B produces 3x the acceleration. How do the masses compare?

Which of the fundamental forces is responsible for bonding?

A triple-beam balance measures the weight of an object.

The force that acts with one or more other forces to produce mechanical equilibrium is called the

Unbalanced forces always cause a change in motion, and balanced forces never result in a change in motion.

The action-reaction pairs always act on the same system.

In the absence of air resistance, all objects fall at the same acceleration.

The force of water against a sandbag wall is what kind of contact force?

The SI unit of force is the