Newton's First Law DOL

Fill in the blank: An object at rest will remain at rest and objects in motion will stay in motion according to __________.

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Law of Conservation of Energy

An object in ______ will stay in ______ unless acted upon by an ______ force.

• motion, motion, unbalanced

• rest, rest, balanced

• motion, rest, balanced

• rest, motion, unbalanced

Tags

NGSS.HS-PS2-1

Fill in the blank: An object at rest will remain at ______ unless something acts on it.

• rest

• motion

• speed

• velocity

What are some other things that could stop a moving object? Select all that apply.

• Friction

• Gravity

• Air resistance

• Time

Tags

NGSS.MS-PS2-5

Is this object experiencing balanced or unbalanced forces?

• Unbalanced because the force on the left is greater than the force on the right.

• Unbalanced because the force on the right is greater than the force on the left.

• Balanced because the forces are equal.

• Balanced because the forces are unequal.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Match the following

• Newton's First Law

• A force that produces no change in the motion of an object.

• Inertia

• An object at rest will remain at rest and objects in motion will stay in motion.

• Unbalanced Force

• A force that causes an object to start to move, speed up, slow down, or change direction.

• Balanced Force

• A force that resists the movement of one surface against another.

• Friction

• The tendency for an object to stay at rest or remain in motion.

Answer both questions in a short response, in complete sentences.

Imagine you are in space, far from any planets or stars, and you throw a tennis ball.

Question 1: Are there any forces acting on the tennis ball after you throw it? If yes, what are they?

Question 2: What do you think will happen to the tennis ball after you throw it? Explain your reasoning using what you know about balanced and unbalanced forces.

Answer explanation

In the vacuum of space, far from any planets or stars, throwing a tennis ball would result in a different outcome compared to doing so on Earth.

1. Unbalanced Forces: When you throw the tennis ball, your hand applies an unbalanced force to it. This force propels the ball forward. In space, there is no air resistance to slow it down, so the ball will continue moving in the direction it was thrown.

2. Continued Motion: According to Newton's First Law of Motion, an object in motion stays in motion unless acted upon by an external force. Since there are minimal forces acting on the ball in the vacuum of space (like gravity from distant objects being negligible), it will keep moving indefinitely at a constant speed in a straight line.

3. Lack of External Forces: Unlike on Earth, where gravity pulls the ball down and air resistance gradually slows it down, in the vast emptiness of space, there are no significant opposing forces. Therefore, the tennis ball will not slow down or change direction unless it encounters another object.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5