Physics Vocabulary
Quantities that have direction, are called this
Vectors
An unbalanced force acting on a mass, causes the mass to do this
Accelerate
The magnitude and direction of the acceleration of a projectile at any point in its flight.
9.81 m/s2 downward
When an object is traveling at a constant speed in a circle, the centripetal accelration and centripetal force, are directed toward the ____________ of the circle.
center
momentum is mass x _______.
velocity
Distance in a straight line with direction is called this
Displacement
If an object is travwling east and slowing down, its acceleration is in this direction
West
A projectile, is launched at an angle ⍬ with the horizontal.
To find the Horizontal Component of its initial velocity, multiply the initial velocity by this.
cos ⍬
The centriptal force keeping an object in a circle is 20N. If the mass is doubled, the centripetal force needed is ________N.
40
Ture or false.
Momentum is a vector and therefore hass direction.
True
The combination of all forces acting on an object is called the _______ force.
net force = Fnet
If an object is moving at a constant speed, then the net force acting on it, is equal to this nember.
zero
A projectile, is launched at an angle ⍬ with the horizontal. To find the Vertical Component of its initial velocity, multiply the initial velocity by this.
sin ⍬
The centripetal force of a satellite orbiting the Earth is equal to this force.
Force of gravity or weight.
An impules is force x ________
time.
An objects resistance to a change in its motion is called this.
Inertia
If an object is moving horizontally, at a constant speed, then the applied force F must equal this force,
Friction
Projectile A is launched horizontally at 10m/s.
Projectile B is launched horizontally, from the same height at 20 m/s.
This projectile will his the ground first.
They will hit the ground at the same time.
The centripetal force of a motorcycle traveling in a circle on an asphalt track, is the same as this force.
Friction
An impulse causes a mass to change its ___________.
velocity.
When all forces acting on an object are balanced (cancel each other out), the object is in this state.
Equilibrium
When the normal force acting upward on an object, is equal to its weight, the net vertical force acting on the object is equal to this
zero
A projectile launched at this angle will have the longest range.
45°
The centripetal acceleration of an object, traveling in a circle is 10m/s2. If you double it's speed the centripetal acceleration will be __________m/s2.
40
Cart A and cart B, initially at rest, are exploded apart by a spring.
If cart A has twice the mass of cart B, compare the magnitude of the momentum of Carts A and B after the explosion.
The same