0
If air resistance is neglected what is the motion of an object projected at an angle consists of a uniform downward acceleration combined with what?
Wiki User
∙ 12y ago
a constant horizontal speed
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Does change in direction cause acceleration?
Not necessarily. Changing direction does affect the velocity, which is acceleration and direction combined.
What is the magnitude of the force on an object in free fall near the earths surface?
-- The force of gravity near the surface of the Earth is close to 9.8 newtons (2.205 pounds) per kilogram of mass. -- "Free fall" means no other forces acting on the object besides gravity. If that's true, then the object's acceleration is 9.8 meters per second2 downward. -- In reality, it's very difficult to achieve real free fall because of air resistance. The effect of air resistance is a force on the object that depends on its speed, shape and size, and acts in the direction opposite to the object's motion. Considering an object in fall, the force of air resistance acts opposite to the force of gravity. So the combined magnitude of both forces is less than the force of gravity alone. That means the object's acceleration is something less than the acceleration of gravity. When it reaches the speed where the force of gravity and the force of air resistance are equal, the combined magnitude of both forces is zero, the object stops accelerating, and falls from there at a constant speed, called "terminal velocity".
How an object changes direction when a force is applied to it is called what?
The combined changes in an object's speed and direction when force acts on it is called "acceleration".
A force of 5n gives a mass of m1 an acceleration of 10m s2 and a mass m2 an acceleration of 20m s2 what acceleration would it give if both the masses were tied together?
Calculate each of the masses using Newton's Second Law. Add the masses, and use Newton's Second Law again for the combined mass.
Which of these is true of a person walking up the steps of a downward-moving escalator a a constant speed?
Here are some things that are true:* The combined speed is also constant * To get the combined speed, you need to subtract one speed from the other (the speed of the escalator, and the speed of the person relative to the escalator) * Acceleration is zero
If cyan magenta and green lights are projected onto the same white area the combined effect is?
cyan, magenta and green lights are projected onto the same white area, the combined effect is:
If 3 resistors of 56 12 and 33 ohms are in parallel what is there combined resistance?
The combined resistance is 7.6049 ohms.
Does change in direction cause acceleration?
Not necessarily. Changing direction does affect the velocity, which is acceleration and direction combined.
Why is resistance less when resistors are join in parallel?
What do you mean? In a parallel circuit, the combined (or effective) resistance is less than any individual resistance.
What is the meaning of the term impedance?
it is combined effect of resistance and inductance
What resistance must be connected in parallel to 6.0-ohm resistor to reduce the combined resistance to 15-ohm?
No such resistor exists. Any resistor placed in parallel with a 6.0 ohm resistor is going to reduce the combined resistance below 6.0 ohms.
How are resistance combined in a series circuit?
Resistances are additive in a series circuit.
Why is resistance more in parallel combination?
Resistors in parallel have a LOWER combined resistance than either alone, not a higher one.
When a 1 ohm resistor and a 1 ohm resistor are connected in series what is their conbined resistance?
The combined resistance will be 2 Ohms.
What is the combined resistance of a 39k and a 47k resistor connected in series?
86k. Resistance in series is the sum of the individual resistors.
4 How do you determine current in a parallel DC circuit?
The current in each individual component of the parallel circuit is equal to (voltage across the combined group of parallel components) / (individual component's resistance). The total current is the sum of the individual currents. ============================== Another approach is to first calculate the combined effective resistance of the group of parallel components. -- take the reciprocal of each individual resistance -- add all the reciprocals -- the combined effective resistance is the reciprocal of the sum. Then, the total current through the parallel circuit is (voltage across the parallel circuit) / (combined effective resistance of the components).
Why are resistances parallel to short circuits neglected in a circuit?
You can consider a short circuit to be a resistor with R=0 Ohms. It is then clear by the equation for calculation of parallel resistance that the combined resistance of a resistor in parallel to a short circuit is 0. Consider the following example with R1= 1k Ohms and R2= 0 Ohms: Rtotal = R1*R2 / (R1+R2) = R1*0 / R1 = 0 Ohms.
