Measurement & Forces Junior 1

In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the resultant force?

• 50N to the left.

• 350N to the right.

• 350N to the left.

• 50N to the right.

Which of the following is an example of a contact force?

• Electrostatic force (静电力）

• Magnetic force

• Frictional force

• Gravitational force

15.6 m² = ___________ cm²

• 1560

• 156000

If your physics teacher and Jia Qin fell in a vacuum, who would hit the ground first?

• Physics teacher

• Jia Qin

• They would hit at the same time

What is the resultant force?

• 40 N to the left

• 40 N to the right

• 0 N

Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?

• Balanced

• Unbalanced

What force slows down a parachute?

• water resistance

• air resistance

• gravitational force

• magnetic force

Which of the following statement is the example of low friction?

• a skydiver uses a parachute

• a ladder leans against the wall

• a student walks on the road

• a hockey puck slides toward the goal

Force does not change the ______ of the object.

• speed

• direction

• shape and size

• mass

When an object is pushed along a horizontal surface to the right, friction will act on the object towards the ________ direction.

• left

• right

• upward

• downward