Physics - Chapter 3 Test Flashcards
What are the 4 forces acting on a projectile?
1) Upward force
2) Horiz force
3) Gravity (downward force)
4) Friction
What variables affect how dar the projectile will travel?
Launch angle, air resistance, mass and initial velocity
The greater the force applied to an object the…its acceleration
greater
The greater the mass of an object, the….its acceleration
less
Friction is a force that….motion
opposes
When an object is at rest, the applied force is …to the friction force
equal
When an object is accelerating, the applied force is… the friction force
greater than
When an object is moving at a constant velocity, applied force is…the friction force
greater than
Acceleration is….to force
Directly proportional
Acceleration is…to mass
Inversely proportional
Acceleration equation
a=f/m (Newton’s 2nd Law of Motion)
Force equation
F=ma
Weight equation
weight=(mass)(accel. of gravity)
When an object is not accelerating…
The motion isn’t changing
- At rest
- Constant velocity
- at equilibrium
- balanced forces
When an object is accelerating….
The motion is changing
- Speed up/ slow down
- Change direction
- Not at equilibrium
- Unbalanced forces
