1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
True [87]
3 years ago
7

3. Sarah, who has a mass of 55 kg, is riding in a car at 20 m/s. She sees a cat crossing the street and slams on the brakes! Her

seat belt stops her from flying forward, bringing her to rest in 0.5 seconds. How much force did the seat belt put on Sarah?
Chemistry
1 answer:
kirza4 [7]3 years ago
7 0

F = (mass)(acceleration) = ma

m = 55 kg

Vi = 20 m/s

t = 0.5 s

Vf = 0 m/s (since she was put to rest)

a=(Vf-Vi)/t

a=(0-20)/5

a = 40 m/s^2 (decelerating)

F = ma = (55 kg)(40 m/s^2)

F = 2200 N

You might be interested in
If 100.0 grams of na3n decompose to form sodium and nitrogen, how many moles of sodium are formed? write and balance equation be
Yakvenalex [24]
The balanced equation is:
2Na_3N-\ \textgreater \ 6Na + N_2

Then proceed with the following equations.


100g Na_3N*(\frac{1molNa_3N}{82.98gNa_3N})*(\frac {6mol Na}{2molNa_3N})*(\frac {22.99gNa}{1molNa})=83.12gNa

The answer is 83.12gNa.
7 0
3 years ago
Read 2 more answers
How long does it take the Earth to move from Point A to Point C?
Naddika [18.5K]

Answer:

the answer should be six months

5 0
2 years ago
If the gold in the crown was mixed with a less-valuable metal like bronze or copper, how would that affect its density?
Sindrei [870]

Answer: If the gold in the crown was mixed with a less-valuable metal such as bronze of copper then this affects its density by making it to weigh even more and if it weighs more then it has less of chance to float. Observe: Drag each of the crowns into the liquid.

Explanation:

6 0
2 years ago
Write down moleculer formula:
Temka [501]
1. Ca(HCO3)2
2.Ca(HCOO)2
3. Ca(OH)2
4.NaOH
5.KCI
6.MgSO4
7.PbO
8.HCl
9.HNO3
10.H2SO4
11.NH3
12.(NH4)3PO4
13.NaOH
:)
5 0
3 years ago
Read 2 more answers
20 POINTS TO WHO ANSWERS THIS
Xelga [282]

answer: D

Here is a list of the most common ways to speed up a chemical reaction

Increase the temperature (reactions that absorb energy)

Decrease the temperature (Reactions that release energy)

3 0
2 years ago
Other questions:
  • How was Aristotle’s model similar to Ptolemy’s model?
    6·2 answers
  • What is the mass percent concentration of a saline solution prepared by dissolving 1.00 mol of Na2SO4 in 1.00 L of water?
    6·1 answer
  • The technetium-99 nuclide radioactively decays by beta emission. write a balanced nuclear chemical equation that describes this
    8·1 answer
  • What is the Lewis Dot Diagram of gold?
    8·1 answer
  • How do the number of protons in an atom affect the atom's<br> identity?
    14·1 answer
  • Ammonia can be made by reaction of water with magnesium nitride as shown by the following unbalanced equation: Mg3N2(s) + H2O(l)
    12·1 answer
  • This can be emitted during the combustion of fossil fuels and traps radiant energy from the:a Greenhouse Effect
    15·1 answer
  • Why do solids not diffuse​
    5·2 answers
  • Which of the following is an example of radiation?( need explanations)
    14·1 answer
  • Determine the atomic number, atomic mass and element name of the following:
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!