Force and motion

What is the unit of force in the International System of Units (SI)?

• Joule (J)

• Newton (N)

• Pascal (Pa)

• Watt (W)

What is momentum?

• Momentum is the product of an object's mass and its velocity.

• Momentum is the force applied to an object over time.

• Momentum is the energy stored in an object due to its position.

• Momentum is the rate of change of an object's acceleration.

What is the difference between speed and velocity?

• Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

• Speed and velocity are the same; both refer to how fast an object is moving.

• Velocity is a scalar quantity that refers to how fast an object is moving, while speed is a vector quantity that includes both speed and direction.

• Speed is a measure of distance traveled over time, while velocity is a measure of time taken to travel a distance.

What is the difference between balanced and unbalanced forces?

• Balanced forces cause an object to accelerate, while unbalanced forces do not change the motion of an object.

• Balanced forces do not change the motion of an object, while unbalanced forces cause an object to accelerate.

• Balanced forces are stronger than unbalanced forces, leading to motion.

• Unbalanced forces always act in pairs, while balanced forces do not.

How does a speed boat respond when it hits a large wave while traveling at a constant rate?

• It would go backward a bit.

• It would speed up significantly.

• It would remain unaffected.

• It would capsize immediately.

What is the effect of gravity on objects in motion?

• Gravity has no effect on objects in motion.

• Gravity pulls objects toward the center of the Earth, affecting their motion and acceleration.

• Gravity only affects objects at rest, not in motion.

• Gravity causes objects to move faster as they ascend.

What is a vector quantity?

• A physical quantity that has only magnitude.

• A physical quantity that has both magnitude and direction.

• A physical quantity that has only direction.

• A physical quantity that is always constant.

Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?

• The car stopped at a red light.

• The bike moving at 15 mph.

• Both have the same momentum.

• It depends on the weight of the bike.

What does Newton's third law state?

• For every action, there is an equal and opposite reaction.

• Energy cannot be created or destroyed.

• Objects in motion stay in motion unless acted upon by an external force.

• The force of gravity is proportional to the mass of the objects.

What is the relationship between force, mass, and acceleration?

• Force (F) = mass (m) × acceleration (a)

• Force (F) = mass (m) + acceleration (a)

• Force (F) = mass (m) - acceleration (a)

• Force (F) = mass (m) / acceleration (a)