Classical Mechanics

1D Kinematics

Velocity Vector for Constant Acceleration

         

An object is thrown straight down with an initial speed of 5 m/s5\text{ m/s} from a bridge. If the atmosphere is completely free of air resistance, how fast will the stone be when it enters the water 0.50.5 seconds later?

The gravitational acceleration is g=10 m/s2.g=10\text{ m/s}^2.

An object is thrown straight upward with an initial speed of 31 m/s.31\text{ m/s}. If the atmosphere is completely free of air resistance, what is its velocity after 44 seconds has passed?

Define upward as positive direction.
The gravitational acceleration is g=10 m/s2.g=10\text{ m/s}^2.

A bullet is being fired from a pistol. As the bullet is fired, it initially accelerates uniformly at 1000 m/s21000\text{ m/s}^2 for 0.150.15 seconds. After 0.150.15 seconds has passed and the bullet has escaped from the pistol, it constantly decelerates at a rate of 1 m/s21\text{ m/s}^2 due to air resistance. What is the speed of the bullet 4.154.15 seconds after the trigger is pulled?

Ignore the effect of gravity.

An object is falling with a speed of 3 m/s.3\text{ m/s}. If the atmosphere is free of air resistance, how fast will the object be falling 33 seconds later?

The gravitational acceleration is g=10 m/s2.g=10\text{ m/s}^2.

A car that is initially traveling at 19 m/s19\text{ m/s} accelerates uniformly for 5.05.0 seconds at a rate of 4.0 m/s2,4.0\text{ m/s}^2, in a straight line. What is the car's velocity after the 5.05.0 seconds?

×

Problem Loading...

Note Loading...

Set Loading...