ReviewQuiz

Which of the following kind of force is exerted by changed particles to one another?

• Electric force

• Weak nuclear force

• Gravitational force

• Frictional force

Which of the following force is associated to radioactive decay?

• Gravitational force

• Strong nuclear force

• Weak nuclear force

• Magnetic force

A coin is sliding across a table. What is the angle of the normal force exerted by the table from its surface?

• 0 degrees

• 90 degrees

• 40 degrees

• 35 degrees

What is the angle of frictional force from the surface of contact?

• 0 degrees

• 90 degrees

• 30 degrees

• 45 degrees

Which of the following is true about weight?

• The weight of an object on earth is different from its weight on mars

• Changing the amount of charged particles can changed the object's weight

• A particle with no mass can still have weight

• Weight is a result of storng and weak forces

Which of the following is NOT due to observable effect of electromagnetic force at macroscopic level?

• Weight

• Tension

• Normal force

• Friction

A safety deposit box is on a floor in the middle of a room with nothing else in it. What forces are exerted on the box?

• Tension and weight

• Normal force and weight

• Normal force and friction

• Weight and Friction

A rag is sliding across the floor. Which of the following is true?

• The friction is to the direction that is opposite the motion of the rag

• The friction is to the same direction as the motion of the rag

• There is no friction

• The friction is perpendicular to the surface of contact between the rag and the floor

A grade 8 students has a mass of 55kg. What is his weight on Earth?

• 5400N

• 550N

• 424N

• 539N

What do you call the tendency of an object to resist motion?

• speed

• force

• inertia

• motion