Physics
The unit for force
Newton
The unit for velocity
Meters per second
The difference between weight and mass
Mass is what makes up the object, weight is how gravity or acceleration acts on an objects mass.
What is the acceleration formula?
a=(Vf-Vi)/t
value of acceleration due to gravity
9.8 m/s2
If an object is at rest, what is its velocity?
0 m/s
A hammer and a feather are dropped at the same time on the moon. They both reach the ground at the same time. Why?
There is no air, so all objects will fall at the same rate
What are the forces acting on a ball thrown into the air
Air resistance and gravity
This is the formula to calculate Speed
What is distance รท time?
What type of energy is stored in a stretched catapult or a bow and arrow?
Elastic potential energy
What is "g"?
Acceleration due to gravity in formulas
When the net force on an object becomes zero, what two conditions can the object be in?
Either at rest or moving with constant velocity
How can you increase friction on ice?
Throwing small rocks' pieces
The difference between Scalar and vector.
What will be the condition of an object if buoyant force on it is more than its weight?
Body will float
A gun is fired directly into the sky, what would the velocity of the bullet be when it reaches it's maximum height?
0 m/s
If a ball of 2 kg is dropped from a height of 15 metre, what will be its kinetic energy just before hitting the ground?
Approx 300 J
What is the acceleration of an object that changes its speed of 45m/s to 75m/s in 5 seconds?
6 m/s^2
Instantaneous speed of a car can be measured by______
speedometer
Area of speed- time graph gives __________
distance travelled by an object
The distance a car traveled if it drove at 40 m/s for 30 minutes
72 km
D = v*t = 40 m/s * 1800 s
D= 72,000 m = 72 km
A stone has a mass of 50 kg in air and 40 kg in air, what wil be the buoyant force?
100 N
Maximum value of static friction is called______
Limiting friction
Tyler runs the basketball court 5 times (from one side back to the other 5 times). Ending in his original starting place. What is Tyler's displacement at the end of his run?
0 meters. He ended where he started
Which law of Newton is also called Law of Inertia?
First law