Homework - Terminal velocity, Newton's 1st law

• Science
• Lower Secondary (Key Stage 3)

Homework - Terminal velocity

What is the force that causes an object to accelerate towards the ground when dropped?

1. Buoyancy
2. Friction
3. Gravity
4. Magnetism

On Earth, at what rate do objects accelerate towards the ground in a gravitational field?

1. 12.5 m/s2
2. 9.8 m/s2
3. 15 m/s2
4. 5 m/s2

What is the term for the constant velocity reached by a falling object in a fluid due to balanced forces?

1. Maximum speed
2. Velocity equilibrium
3. Free fall
4. Terminal velocity

What factors determine the terminal velocity of an object falling through a fluid?

1. Temperature and speed
2. Fluid type and surface area
3. Weight and shape
4. Color and size

In the absence of air resistance, all objects fall with the same acceleration due to which force?

1. Electricity
2. Momentum
3. Gravity
4. Tension

According to Newton’s first law, what is needed to start a stationary object moving?

1. inertia
2. friction
3. a resultant force
4. gravity

What is required to slow down or speed up a moving object according to Newton’s first law?

1. a resultant force
2. inertia
3. momentum
4. kinetic energy

In the context of Newton’s first law, what is needed to stop a moving object?

1. centripetal force
2. air resistance
3. drag force
4. a resultant force

According to Newton’s first law, what is required to change the direction of a moving object?

1. acceleration
2. velocity
3. momentum
4. a resultant force

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

1. It creates energy
2. It affects the motion of objects
3. It generates heat
4. It causes friction

What is the term used to describe the tendency of objects to continue in their state of rest or of uniform motion?

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

Why does your body continue to move forwards when travelling in a car and the brakes are applied?

1. Traction
2. Momentum
3. Inertia
4. Resistance

What stops your body from moving forward when a car brakes in motion?

1. Cushion
2. Airbag
3. Seat belt
4. Headrest

Which physical property causes your body to resist changes in motion?

1. Inertia
2. Flexibility
3. Elasticity
4. Density