Weight and terminal velocity

Which of the following is the correct equation which relates gravitational field strength, mass and weight?

• Weight = mass / gravitational field strength

• Weight = mass + gravitational field strength

• Weight = mass x gravitational field strength

• Weight = mass² x gravitational field strength

Which of the following are the units of gravitational field strength?

• N

• kg

• N/kg

• Nkg

What do we call the special case of velocity of an object when it falls through a medium at its fastest velocity, and cannot accelerate any more.

A student does an experiment to investigate a steel ball bearing falling through water and oil as shown in the diagram. What is the name of the downward force on each ball bearing?

The student obtained the following result for the motion of the ball bearing through the water, before it hit the bottom. In the first 2 seconds which force is greatest?

After two seconds, what do we know about the two forces acting on the ball bearings? They are __________________. (ignore the red box for this part of the question)

Oil is more viscous (thicker) than water, will the ball bearing reach a faster or slower speed in the oil compared to the water?

• Faster terminal velocity

• Slower terminal velocity

The lunar vehicle weighs 300N on Earth, calculate it's weight on the moon. g on the moon is 1.6N/kg and 10N/kg on Earth.

The strength of gravity at the Earth's surface is 10 N/kg. Calculate the weight of a car with a mass of 1500 kg.