7th grade : Cambridge Science Unit 3 - Forces & Energy

What is definition of "Force"

• a strength that cause an object tend to move

• the force of gravity on an object

• the amount of matter of an object

• the force that attracts an object toward the center of planet

What is definition of "Weight"

• a strength that cause an object tend to move

• the force of gravity on an object

• the amount of matter of an object

• the force that attracts an object toward the center of planet

What is definition of "mass"

• a strength that cause an object tend to move

• the force of gravity on an object

• the amount of matter of an object

• the force that attracts an object toward the center of planet

What is definition of "gravitational force field"

• a strength that cause an object tend to move

• the force of gravity on an object

• the amount of matter of an object

• the force that attracts an object toward the center of planet

State the relation / equation for Weight, Mass & Gravitational field strength

• m = W . g

• W = m . g

• g = m . W

• W = m / g

What is unit of measurement of "Mass"?

• kg

• N/m²

• m/s²

• N = kg.m/s²

What is unit of measurement of "gravitational field strength"?

• kg

• N/m²

• m/s²

• N = kg.m/s²

What is unit of measurement of "Weight"?

• kg

• N/m²

• m/s²

• N = kg.m/s²

Gravitational field strength on earth is

• 9,8 N/kg

• 10 kg

• 9,8 m/s²

• 10 m²

Which statement is correct

• mass is the same as weight

• weight is the amount of matter of an object

• mass is the amount of matter of an object

• weight is an interaction that tend an object to move