Question

A motorcycle traveling 90 mph accelerates to pass a truck. Five seconds later the car is going 120 mph. Calculate the acceleration.

Answer 1

Answer:

In physics, acceleration is the rate at which the velocity of a body changes with time. For example, an object such as a car that starts from a full stop, then travels in a straight line at increasing speed, is accelerating in the direction of travel. If the car changes direction at constant speed, there is strictly speaking an acceleration, although not described as such; passengers in the car will experience a force pushing them back into their seats in linear acceleration, and a sideways force on changing direction. If the speed of the car decreases, or decelerates, mathematically it is acceleration in the opposite direction.

The formula for acceleration = A = (Vf – V0)/t and is measured in meters per second2. Here is a typical question:

A car starts from standing top and in 10 seconds is travelling 20/meters per second. What is the acceleration?

a. 0.5 m/sec2

b. 1.5 m/sec2

c. 1 m/sec2

d. 2 m/sec2

The formula for acceleration = A = (Vf – V0)/t

so A = (20 m/sec – 0 m/sec)/10 sec = 2 m/sec2

Speed

Speed is the rate of change of an objects position, or,

speed = (total distance traveled)/(total time taken).

Here is a typical question:

A rocket travels 3000 meters in 5 seconds. How fast is it travelling?

a. 100 m/sec

b. 200 m/sec

c. 500 m/sec

d. 600 m/sec

Answer: D

speed = (total distance traveled)/(total time taken)

3000/5 = 600 meters per second.

Step-by-step explanation:

please follow me