Net Forces
If a 10 N force acts to the left and a 15 N force acts to the right on an object, what is the resulting net force?
5 N to the right
This positively charged subatomic particle is located inside the nucleus of an atom.
Proton
This gravitational phenomenon keeps the Moon revolving in a fixed orbit around Earth.
Gravitational Pull of Earth
A truck travels 50 km in 1.5 h, 75 km in 2.0 h, 60 km in 1.5 h, and 55 km in 1.0 h. It traveled fastest during this segment.
Segment 4 (55 km/h)
A rocket expels gases downward to propel itself upward, demonstrating this law of motion.
Newton's Third Law of Motion
Which pair of forces acting on a block will result in no motion: 12 N vs 5 N, or 20 N vs 20 N in opposite directions?
20 N and 20 N in opposite directions
Negatively charged subatomic particles are found in these regions surrounding the nucleus.
Orbits, (Electron Shells)
If the distance between the Earth and the Moon were doubled, the gravitational force between them would do this.
Decrease
On a Distance vs. Time graph, a higher speed is represented visually by a line with a steeper one of these.
Slope
When Student A on roller skates pushes Student B, Student B moves forward while Student A moves in this direction.
Backwards
Which pair of opposite forces causes the greatest change in motion: 5 N vs 20 N, or 10 N vs 20 N?
5 N and 20 N (net force of 15 N)
The nucleus of an atom contains protons and neutrons, giving it this overall net charge.
Positive Charge
Between two 100 kg masses spaced 1,000 m apart and two 100,000 kg masses spaced 1,000 m apart, this pair experiences a larger gravitational force.
two 100,000 kg masses
When a toy car is released down ramps of heights 2 cm, 4 cm, 6 cm, and 8 cm, the distance traveled increases. This is the relationship between ramp height and distance.
direct relationship (increasing height increases distance)
A swimmer pushing water backward to move forward and a ball bouncing off a wall both demonstrate this type of force pair.
action-reaction force pairs
According to F = ma, between a 5 kg block with 10 N applied and a 10 kg block with 10 N applied, this block experiences the greatest acceleration.
5 kg block
An atom containing 6 protons, 6 neutrons, and 6 electrons has a net charge on its nucleus alone equal to this.
+6
Planets located closer to the Sun orbit faster because they experience more of this force.
gravitational attraction from the Sun
If Car A travels a distance of 7 km in 30 minutes, its speed in km/h is this.
14 Km/h
Action and reaction forces do not cancel each other out because they act on this many distinct objects.
Two Different Objects
In a balloon rocket assembly, this force is responsible for propelling the balloon forward along the string.
Force from the escaping air (reaction force)
This fundamental force keeps negatively charged electrons bound in orbit around the positively charged nucleus.
electromagnetic force (electrostatic attraction)
If Object A (2.0 kg) weighs 40 N on Planet X, and Object B (0.5 kg) weighs 20 N on Planet Y, this planet has the stronger surface gravity.
Planet Y (40 N/kg vs 20 N/kg )
To test how mass affects stopping time, a scientist must keep speed and braking force constant while changing this variable.
mass of the vehicles (e.g., car vs. truck)
According to Newton's Third Law, when a light car collides head-on with a heavy truck, the impact force felt by the car compared to the truck is this.
Equal