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Definitions
Definitions
Practice problems
Practice problems
Random questions
100

What is a FoR? 

What stays still in order to observe an object move. 

100

What is air resistance?

The force air exerts on a moving object. 

100

Toby told Michael he can run at a speed of 6m/s. To see if he could run faster michael told him to time him while he was skating as fast as he could for 200m. It took Michael 40s. How fast can Michael skate. 

5m/s

100

If an eagle is diving directly down into water what was it's final velocity if it hit the water 4.21 seconds after falling?

41.679m/s

100

What is newton's 3rd law of motion?

For every action, there is an equal and opposite reaction.

200

What is net force?

The sum of the forces acting on an object. 
200

What is gravity?

Gravity is a force of attraction between two objects due to their mass and the distance between them. 

200

A train is moving with a force of 5,000N. If the car has an acceleration of 4m/s2 then what is the mass in lbs?

2,750lbs. 

200

if 0.478kilowatts of power are used in 17 seconds to move a desk along the floor how much was work was done?

w=8,126J

200

What does it mean to accelerate?

There is a change in speed and direction 

300

What is velocity?

Rate of change in distance or position with direction 

300

What is speed? 

The rate of change in position. 

300
An excavator exerts a vertical force of 82N to lift a rock to a height of 6M in a time of 10 seconds. How much power is used to lift the box?

49.2W

300

A fish is swimming and accelerates at a rate of 40cm/s2. If the dolphin started at rest and reached a final velocity of 4.1m/s, how much time did it accelerate for? 

10.25sec

300
What is scientific notation?

A convenient way to express very large or small numbers. 

400

What is work?

The product of force and distance. Work is done on an object when a force acts on the object in the direction the object moves. 
400

what is inertia?

An objects tendency to do nothing/remain unchanged 

400
A penny is flicked straight up into the air with an initial velocity of 6m/s. How long does it take to reach the highest point (in seconds)?

0.61sec

400

A football player does 67 J of work to lift his gym bag up above the lockers.  If it takes him 3.2minutes to do this, what is the power it required

0.348W

400

What is the difference between G and g?

G= A universal gravitational constant 

g= acceleration caused by the force of gravity 

500

What is Horse Power?

A unit developed based on power output and strong horses. 

500
What is power?
The rate of doing work. Doing faster work requires more motion. 
500

A bus picks up its students and then accelerates at a rate for 7m/s2. If the bus started from rest, what is the final velocity it reached after 3.2 seconds? 

Vf= 22.4m/s

500

A kid who's driving a toy car is carrying a bucket of sand at 0.52m/s2 for 10 mins using a force of 25N. How much work are they doing?

7,800J 

500

When does acceleration due to gravity change?

When other forces are present like air resistance