Newton's Laws
Which law states that every action has an equal and opposite reaction force?
Newton's 3rd Law of Motion.
What kind of force acts to oppose motion when two surfaces rub together?
Friction.
A bicyclist travels 15 km in 3 hr. What is the average speed? WITH UNITS.
5 km/hr
Give two common units for measuring distance in science class.
Meters, Miles, Feet, Centimeters, Millimeters, Inches
What is the formula for speed?
Speed = distance / time
What is the equation for Newton's 2nd Law?
What is the force that keeps us on the ground?
Gravitational Force.
If a person goes from home to the grocery store that is 2 miles east and then travels back home (2 miles west), what is their displacement?
Zero, they ended where they started.
What are 2 units that represent speed?
meters/second, centimeters/second, feet/second, miles/hour, kilometers/hour, feet/minute, meters/minute.
What the formula for average velocity?
velocity = displacement/time
If a swimmer is competing in the backstroke event, what law of motion is this representing?
The 3rd Law of Motion.
What is the type of force on a rope when a person is rock climbing?
Tension Force.
How are speed and velocity different? Give a short example.
Speed is the rate of distance that an object can go in a given amount of time whereas velocity is speed WITH direction.
What unit is needed to differentiate between speed and velocity?
Direction.
How do you find displacement?
Final position - initial position = displacement
A student kicks a soccer ball at recess and scores a goal, which one of newton's laws is this exhibiting?
Newton's 1st Law of Motion.
What is an example of a non-contact force?
Gravitational, electrical, magnetic
A baby lizard startles you. The sweet little lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard’s average acceleration as he runs away from you?
10 m/s - 2 m/s / 4 sec = 8 m/s / 4 sec = 2 m/s2
What are 2 units for time?
Seconds, minutes, hours.
How do you find time if you are provided speed and distance?
time = distance / speed
What is Newton's 1st Law of Motion?
An object in motion stays in motion or an object at rest stays at rest unless acted on by an outside force.
What are the three contact forces?
Friction, Buoyancy, Tension.
A runner moves from 1 m to 11 m in 2 s. What is the average velocity?
11m-1m/2s= 10m/2s= 5m/s.
What are two units that represent acceleration?
m/s2, km/s2, km/hr/s, cm/s2
What is the formula for acceleration?
acceleration = velocity (final) - velocity (initial) / time