A car going at a constant speed is not accelerating (its rate of acceleration is zero).
Answer This occurs when an object istraveling in one direction but has an acceleration in the opposite direction, which means it is decreasing in speed. For a given period of time, the speed has decreased. Acceleration is the change of velocity per second. T1 = 5 seconds V1 = 100mph T2 = 10 seconds V2= 50 mph Acceleration = (V2 - V1 ) / (T2 - T1) = (50-100)/(10-5) = -10 ft/sec/sec Positive(+) acceleration means an object will be going faster over an interval of time.
If the car doesn't change direction during that 100 seconds, then it's zero. If the car's direction changes, then the acceleration isn't zero, but the question doesn't give any information from which to evaluate it.
If the speed of an object is doubled while its acceleration remains constant, the object's acceleration does not change. Acceleration is a measure of how speed changes over time, so as long as the object maintains a constant acceleration, doubling its speed will not affect the acceleration.
Speed is the rate of motion usually expressed as distance traveled per unit of time.Velocity is the rate of change of position. Both speed and direction are required. Acceleration is the rate of change in velocity. In common speech, acceleration is only for an increase in speed; a decrease in speed is deceleration. In physics, any increase or decrease in speed or change of direction is referred to as acceleration. For more information, look at: http://en.wikipedia.org/wiki/Speed http://en.wikipedia.org/wiki/Velocity http://en.wikipedia.org/wiki/Acceleration
Since the car is traveling at a constant speed, the net force on the car is zero. The forces acting on the car (like friction, air resistance, and engine force) are balanced to maintain the steady speed without acceleration.
Acceleration is the time rate of change of velocity. If velocity is constant, then acceleration is zero. Note: "100 km per h for 10 seconds" is a constant speed, but not necessarily a constant velocity, since we're told nothing about the direction. If the car moves in a perfectly straight line during those 10 seconds, then its velocity is constant. If it makes a curve, then its velocity is not constant even though its speed is, and there is acceleration.
Answer This occurs when an object istraveling in one direction but has an acceleration in the opposite direction, which means it is decreasing in speed. For a given period of time, the speed has decreased. Acceleration is the change of velocity per second. T1 = 5 seconds V1 = 100mph T2 = 10 seconds V2= 50 mph Acceleration = (V2 - V1 ) / (T2 - T1) = (50-100)/(10-5) = -10 ft/sec/sec Positive(+) acceleration means an object will be going faster over an interval of time.
The answer is very simple. The words "constant velocity" are the definition of zero acceleration.
If the car doesn't change direction during that 100 seconds, then it's zero. If the car's direction changes, then the acceleration isn't zero, but the question doesn't give any information from which to evaluate it.
If the speed of an object is doubled while its acceleration remains constant, the object's acceleration does not change. Acceleration is a measure of how speed changes over time, so as long as the object maintains a constant acceleration, doubling its speed will not affect the acceleration.
Speed is the rate of motion usually expressed as distance traveled per unit of time.Velocity is the rate of change of position. Both speed and direction are required. Acceleration is the rate of change in velocity. In common speech, acceleration is only for an increase in speed; a decrease in speed is deceleration. In physics, any increase or decrease in speed or change of direction is referred to as acceleration. For more information, look at: http://en.wikipedia.org/wiki/Speed http://en.wikipedia.org/wiki/Velocity http://en.wikipedia.org/wiki/Acceleration
Two hours at a constant 50 mph, excluding speed changes or stops along the way.
It would take a train going 35 miles per hour approximately 2 hours and 51 minutes to travel 100 miles assuming the constant speed of 35 miles was kept.
s=d/ts= 100 / 12s= 8.33ms-1
Acceleration: 5 seconds from 0 to 100 km/h (0 to 60 mph) Top speed: 250 km/h (155 mph)
Any curved line will indicate a change in acceleration. Straight lines with slope indicate a steady velocity and straight lines with zero slope indicate a lack of motion.If the X axis (left to right) is for time and the Y axis (up and down) is for speed, it would curve up.
Since the car is traveling at a constant speed, the net force on the car is zero. The forces acting on the car (like friction, air resistance, and engine force) are balanced to maintain the steady speed without acceleration.