Gravity is one of the most important forces in the universe. An object with mass in a gravitational field experiences a force known as weight.
What force is caused by gravity?
What is the gravitational field strength of Earth?
How is weight calculated?
Weight = mass × gravitational field strength
Weight = gravitational field strength ÷ mass
Weight = mass ÷ gravitational field strength
What is the weight of a 40 kg child on Earth (g = 9.8 N/kg)?
How is the object shown in a free body diagram?
As a drawing of the object
As a written description of the object
As a box or a dot
In which way does an arrow point in a free body diagram?
Towards the object
Away from the object
In the direction of movement
What is a newton meter?
A unit for speed
A calibrated spring-balance
A unit for weight
Two 30 N forces act on an object in opposite directions. Which statement is correct?
The resultant force is: 30 + 30 = 60 N
The resultant force is: 30 - 30 = 0 N
The resultant force is: 2 × 30 = 60 N
How is work done calculated?
Work done = force × distance
Work done = distance ÷ force
Work done = force ÷ distance travelled
How much work is done when a ball is moved 1.5 m by a force of 12 N?