SCIENCE MIND CHALLENGE FIRST QUARTER

According to Newton's first law of motion, what will happen to a moving object that is not acted on by an unbalanced force?

• Will accelerates.

• Will change its momentum.

• Will remain in motion.

• Will eventually come to a stop.

Which of the following scenarios shows that there is NO net force present?

• A billboard hanging steadily.

• An overripe guava falling off a tree.

• A police car running after an errant person.

• A bicycle slowing down before making a turn.

In a local supermarket, you can easily push a shopping cart with 10 kilograms of household products than a shopping cart with 20 kilograms of household products to the counter. Which Law of Motion best explains the given situation?

• Law of Acceleration

• Law of Inertia

• Law of Action-Reaction

• Law of Interaction

A ball thrown upward will apparently stop and fall back to the ground, what type of force could have caused the falling of the ball?

• Elastic Force

• Gravitational Force

• Frictional Force

• Normal Force

You are riding in a bus and the driver suddenly applied his force to the brakes. You notice that your body moves forward, the bus moves again, and your body moves backward. Which property of matter illustrates this observation?

• Force

• Mass

• Inertia

• Net Force

If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration? (F=ma)

• The one with a mass of 0.78 kg will have the greatest acceleration.

• The one with a mass of 0.52 kg will have the greatest acceleration.

• They will both accelerate at the same rate.

• Cannot be determined.

What could best refer to Newton's Third Law of Motion?

• In every action there is an equal opposite reaction.

• The magnitude of an object is always equal to the inertia.

• Force is always equal to the mass and the acceleration of an object.

• An object at rest or move at a constant velocity unless an unbalance external force acted upon it.

You accidentally hit a rock with your foot as a result you got hurt; this reaction is an example of what law of motion?

• Law of conservation of Momentum

• Newton's Law of Inertia

• Newton's Law of Acceleration

• Newton's Law of Interaction

You hit a wall with a stick. What would be the equal and opposite reaction?

• the wall pushes against you

• you push against the stick

• the stick pushes against you

• the wall pushes against the stick

Tug of war is a game that tests the strength of two opposing teams. Two groups of Grade 8 students in a tug of war are pulling the rope with the same amount of force. Applying Newton's Law of Motion, what will happen to the groups of students?

• Group A will win.

• Group B will win.

• Group A and B will fall.

• Group A and B will not move.