Phys. Sci. Chapter 3 - Forces and Newton's Laws

The SI unit of force is the

If you weigh 728 N on a mountain and your mass is 75 kg, what is gravity on the mountain?

What are SI units of time?

Which body exerts the strongest gravitational force on you?

____ is the maximum speed an object will reach when falling through a substance, such as air.

Which term describes the tendency of an object to resist a change in motion?

What is gravitational force on the Moon compared to Earth?

Attractive force between 2 objects that depends on their masses and their distances

Which of Newton's Laws is sometimes called the Law of Inertia?

Which term describes the forces on an object with a net force of zero?

When an object moves in a circular path, the net force is called a(n)

What is the equation for Newton's Law of Universal Gravitation?

A _____ is a push or pull.

What is the gravitational force exerted on an object called?

An object always accelerates in the same direction as which of the following?

Which of the following is true about an object in free fall?

What is the numerical value and units of gravitational force on Earth?

An astronaut has a mass of 150 kg and has a weight of 555 N on Mars. What is Mars' gravity?

_____ opposes the sliding motion of two surfaces that are in contact.

_____ is the sum of all the forces acting on an object.

If a 6OOO kg elephant sits on a donkey, what is the weight squashing the donkey?

If gravity is the only force acting on object, the object is said to be

_____ is a friction-like force that opposes the motion of objects that move through the air.

Which explains why astronauts seem weightless in orbit?

___ says if no external forces act on a group of objects, their total momentum does not change.

Which of Newton's Laws is sometimes called the law of action and reaction?

A wagon has a mass of 50 kg. If the net force on the wagon is 500 N, what is the acceleration?

What is the equation for calculating weight in physics?

What are SI units of momentum?

A man weighs 600 N on Earth. What is his mass?

What equation is associated with Newton's 2nd Law of Motion?

The _____ of an object is different on every planet in the solar system.

What are SI units of acceleration?

The graph shows the speed of a car moving in a straight line. Which parts show balanced forces?

If you had a mass of 50 kg on Earth, what is your weight?

What letter is associated with gravitational force on Earth?

Which of the following is NOT a force?

____ relates the net force exerted on an object to its mass and acceleration.

One newton (N) is equal to what basic SI units?

What is the net force on a sky diver falling with a constant velocity of 50 m/s downward?