Homework - Newton's 2nd and 3rd law

• Science
• Lower Secondary (Key Stage 3)

Homework - Newton's 2nd and 3rd law

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

1. Force = mass x acceleration
2. Force = mass / acceleration
3. Force = mass + acceleration
4. Force = mass - acceleration

What happens to an object's acceleration if a larger force is applied?

1. It remains constant
2. It decreases
3. It increases
4. It becomes zero

How does the mass of an object affect its acceleration?

1. The mass and acceleration are unrelated
2. The larger the mass, the smaller the acceleration
3. The mass has no effect on acceleration
4. The larger the mass, the larger the acceleration

What does acceleration represent?

1. A change in position
2. A change in force
3. A constant speed
4. A change in velocity

In the formula F = ma, what does 'F' represent?

1. Energy
2. Mass
3. Acceleration
4. Force

What does a larger mass of an object require to change its velocity?

1. A larger force
2. No force
3. A smaller force
4. The same force

What happens to an object's acceleration when a larger force is applied?

1. It decreases
2. It turns into mass
3. It increases
4. It remains constant

What is the statement of Newton’s third law?

1. For every force there is an equal and opposite force
2. For every action there is an equal and opposite reaction
3. For every motion there is an equal and opposite motion
4. For every reaction there is an equal and opposite action

According to Newton’s third law, what happens when two objects interact?

1. The forces cancel each other out
2. A pair of forces act on the two objects
3. No force is exerted on the objects
4. A single force acts on both objects

Why does a rocket move upward when the hot gases are expelled downwards?

1. Due to gravity pulling the rocket upward
2. Due to the equal and opposite reaction forces
3. Due to the rocket's shape and design
4. Due to the rocket's mass

Why do you move forward when you walk even though your feet push backwards?

1. Your body's momentum carries you forward
2. Friction between your feet and the ground
3. Your feet propel you forward
4. The ground exerts an equal and opposite force forward

What is the relationship between the size and direction of the forces in Newton’s third law?

1. The size of the forces on one object is greater than the other
2. The size of the forces on each object is equal and the direction is opposite
3. The size of the forces on each object is different and the direction is the same
4. The direction of the forces on each object is the same

Newton's first law

What is the role of a resultant force according to Newton’s first law?

1. stop a moving object
2. change the direction of a moving object
3. start a stationary object moving
4. slow down or speed up a moving object

What is the tendency of objects to continue in their state of rest or motion?

1. velocity
2. acceleration
3. inertia
4. momentum

How does Newton’s first law explain the movement of the body in a car when it brakes?

1. Friction slows down the body
2. Air resistance pushes the body back
3. Inertia keeps the body moving forward
4. Gravity pulls the body forward

Why does a moving object continue to move at a constant speed when no force is acting on it?

1. Inertia
2. Momentum
3. Friction
4. Gravity

What is the purpose of a seat belt in a moving car according to Newton’s first law?

1. To change the direction of the body
2. To increase speed
3. To stop the body's forward motion
4. To reduce friction