Exploring Forces and Motion

What are the two main types of forces?

• Frictional forces and gravitational forces

• Magnetic forces and electrical forces

• Tension forces and buoyant forces

• Contact forces and non-contact forces

Define contact forces and give an example.

• Friction is an example of a contact force.

• Gravity is an example of a contact force.

• Magnetism is an example of a contact force.

• Electricity is an example of a contact force.

What is Newton's First Law of Motion?

• An object will change its direction only if a force is applied.

• An object will remain at rest or in uniform motion unless acted upon by an external force.

• An object will accelerate if no forces are acting on it.

• An object will remain in motion only if it is in a vacuum.

How does inertia relate to Newton's First Law?

• Inertia is the force that causes an object to move faster.

• Inertia is the resistance of an object to change its state of motion, as described by Newton's First Law.

• Inertia only applies to objects in motion, not at rest.

• Inertia is the same as mass, which is unrelated to motion.

What is the formula for calculating force according to Newton's Second Law?

• F = m - a

• F = m / a

• F = m + a

• F = m * a

If a 10 kg object is accelerated at 2 m/s², what is the force applied?

• 25 N

• 15 N

• 20 N

• 10 N

Explain Newton's Third Law of Motion with an example.

• When you throw a ball, it travels in a straight line without any force acting on it.

• A car accelerates forward when the driver pushes the brake pedal.

• When you push against a wall, the wall moves towards you.

• An example of this is when you jump off a small boat onto a dock. As you push down and back on the boat (action), the boat moves backward (reaction) due to the force you applied.

What is the relationship between action and reaction forces?

• Action forces are always greater than reaction forces.

• Action and reaction forces are equal in magnitude and opposite in direction.

• Action and reaction forces can act on the same object.

• Reaction forces occur only after action forces are applied.

What is friction and how does it affect motion?

• Friction is a force that enhances motion, making objects move faster.

• Friction has no effect on motion and is irrelevant to movement.

• Friction is only present in liquids and does not occur in solids or gases.

• Friction is a force that opposes motion, affecting how objects move by slowing them down or enabling grip.

Name the four types of friction.

• static friction, kinetic friction, rolling friction, fluid friction

• frictionless motion

• dynamic frictional force

• static resistance