6310 Force Quiz

What force is always present when an object is close to the earth's mass?

• Applied Force

• Normal Force

• Frictional Force

• Gravitational force

Answer explanation

The gravitational force is a fundamental interaction that causes attraction between any two objects with mass.

What is the net force (N) shown in the picture? (合力)

(Please simply type in the number)

Mathematical Equivalence

ON

Answer explanation

Balanced forces are those that are opposite in direction and equal in size.

The net force is the vector sum of all the forces that act upon an object.

Match the following

• an opposing force to motion

• Motion

• A non contact force that pulls objects together

• Gravity

• A push or a pull

• Friction

• The current location of an object.

• Force

• Movement of an Object

• Position

Name the missing force...

• weight force

• normal force

• applied force

• frictional force

Answer explanation

The normal force is the force that surfaces exert to prevent solid objects from passing through each other.

Forces have both ​ (a)   and ​direction.

• magnitude
• speed
• height
• direction

Answer explanation

Every force has a magnitude and direction since force is a vector.

Draw the force arrows.

Answer explanation

Which way is the object moving?

• It is not or moving at a constant speed

• moving to the right

• moving to the left

• going up

Answer explanation

Balanced forces are those that are opposite in direction and equal in size. Balanced forces are considered to be in a state of equilibrium. When forces are balanced there is no change in direction.

What kinds of forces are in this picture?

(Please label)

c

d

e

f

Tension

Friction

Normal force

Push

Gravity

Air Resistance

Answer explanation

Which of the activities shows force can move the stationary object?

• 
• 
• 
• 

Answer explanation

The third picture shows how force can change the state of motion of an object. The force applied to the ball by the boy's foot causes it to change from rest to motion. The 1st, 2nd, and 4th pictures show how force can change the shape of an object.

When an object is not moving, it is called stay at ____.