Forces

During a tug-of-war competition, neither team is able to gain an advantage. Which of the following explains the forces in this situation?

• The forces are balanced

• The forces are overcome by friction

• The mass of the rope cancels the forces on it

• The forces are unbalances

A toy train engine rests motionless on a track. One student begins pushing the engine to the right with a force of 12 Newtons (12N). At the same time, another student begins pushing the engine to the left with a force of 15 Newtons (15N). The track is flat.

Which of the following best describes the resulting motion of the engine?

• It travels left at an increasing speed

• It travels left with a constant speed

• It travels right with an increasing speed

• It travels right at a constant speed

One student pulls a box to the west with 50N while another student pushes the box to the west with 20N. What is the total amount of force being used on the box?

• 30N to the east

• 30N to the west

• 70N to the west

• 70N to the east

Which of the following examples best represents an object with balanced forces acting upon it?

• A horse running on a track

• A boat moving through the water

• A book sitting on a table

• A leaf falling from a tree

For an object to remain at rest, which of the following must be true?

• The forces on it need to be unbalanced

• No friction acting on it

• No gravity acts on the object

• The forces on the object are balanced

Speed and velocity are similar because they

• both give direction that an object is moving

• both change the mass of the object

• both give the distance that an object moves

• both convey the acceleration of an object

A dog walks a distance of 100 m in 20 s of time. What is the dog’s speed in feet per second?

• 5 m/sec

• 200 m/sec

• 300 m/sec

• 80 m/sec

An _______ force must act on an object for it to CHANGE it's motion

• balanced
• unbalanced
• gravitational
• electrical

Tags

NGSS.MS-PS2-2

What is the unit to MEASURE force?

• Kilogram

• Meter

• Pounds

• Newton

Tags

CCSS.8.EE.A.4

The sum of all forces acting on an object.

• Contact Force
• Balanced Force
• Unbalanced Force
• Net Force

Tags

NGSS.MS-PS2-2