Newton Worksheet

A newton is the amount of force required to accelerate a mass of one kilogram at a rate of one meter per second squared. Notions and ideas of mass and force are often confused in everyday life, but must be kept separate in science and engineering. The newton was first used around 1904, but not until 1948 was it officially adopted by the General Conference on Weights and Measures (CGPM) as the name for the S.I. unit of force.
1 N = 1 kg·m·s2
An
example. A car with a mass of 1200 kg accelerates 2.2 m/s2. How many N's are required?
N=
1200 kg·2.2m/s2
N=
2640 kg·m/s2
Since a Newton is equal to one (1) kg·m/s2
N=
2640
Please be a ware that these are often multi-step problems. Try the following approach to their solution.
  1. Identify all of the variables in the description of the problem. Note the units that these variables are stated in.
  2. Calculate acceleration

    		 ΔV
    t




3. Find the product of mass and acceleration.

Complete the following force (N) problems:
  1. An airplane with a mass of 6 250 kg dives to an altitude of 1500 m. It changes its speed from 1 200 m/s to 2 200 m/s in 1.2 s. How much force was required? Hint: Calculate the acceleration first.
  2. A rocket with a mass of 69 000 000 kg accelerates 7001 m/s2 in 25 s. How much force was required?
  3. A steam ship carrying 115 000 000 kg of frozen orange juice accelerates from 0.9 m/s to 1.0089 m/s in 34 minutes. How much force was required to accelerate to orange juice? The ship has a mass of 41 000 000 kg. What was the total force required? Hint: There are really three problems here. Convert minutes to seconds.
  4. A train consists of 87 cars of coal with an average mass of 105 454 kg/car. The train slows from 12 m/s to 0.98 ms in 192 s. How much braking force (N) was required to produce the trains deceleration?
  5. The train in problem four hits a car with a mass of 1200 kg and an acceleration of 0.01 m/s head on. The police want to know what was the total force of the collision? What was the last thing that went through the car drivers mind1?
  6. A space craft, with a mass of 1725 kg re-enters the earths atmosphere at a speed of 204 000 m/s. Thirty two s later it has a speed of 307 m/s. How much force did the earths atmosphere absorb in N?

Footnotes:

1The windshield.

File translated from TEX by TTH, version 3.70.
On 18 Jan 2006, 09:13.