Science ~conversions~
posted by Maggie .
On my physics home work i have a question that puts the weight in grams, and i need to find the acceleration. I know that the formula is F=ma, and Force is in newtons, mass is in kg and acceleration is in m/s^2. but can you still find the acceleration by using grams with out converting? because when a converted the mass (1.5g) to kg (.0015kg) and then put it throught the equation the answer didn't fit with the problem.
the problem is asking the acceleration of a bug (1.5g) when a spider pulls it by a massless spider silk with .001N.
when i put in the formula without converting i get .0073m/s^2. which seems plausible.
but when i convert i get 7.3m/s^2. which would make a VERY fast spider....
so i guess my question is just:
do you HAVE to convert in order to get the correct answer

oops. correction. the spider is pulling with .011N. NOT .001

Maggie, you on the right way but I don't understand how did you get both the values.
The solution is
a = F/m = 1*10^(3)/1.5*10^(3)= 1/1.5 = (2/3) m/s^2 = 0.67 m/s^2. 
Not a big deal:
a = 1.1*10^(2)/1.5*10^(3) =
= (1.1/1.5)*10 = 7.3 m/s^2
Good for a spider! 
a= F/m=0.001/1.5•10⁻³=0.67 m/s²
Respond to this Question
Similar Questions

physics
What does a 15 kg mass weigh on Earth? need assistance in setting up problem to get answer in Newtons and in pounds. thanks Weight in Newtons = M g =(Mass in kg) x (acceleration of gravity in m/s^2) The acceleration of gravity on Earth 
Physics, 4 short questions
VERY IMPORTANT FOR AN ESSAY ASSIGNMENT. PLEASE HELP ASAP! THANK U VERYYYYY MUCH! 1. What force is needed to give a mass of 25 kg an acceleration of 20m/s squared? 
Physics .. help!!
Imagine a landing craft approaching the surface of Callisto, one of Jupiter's moons. If the engine provides an upward force (thrust) of 3270 N, the craft descends at constant speed; if the engine provides only 2190 N, the craft accelerates … 
math
How much force is needed to accelerate a 50kg rider and her 250kg motorcycle at 5 m/s2? 
physics
Calculate the acceleration due to gravity on the moon. The moon\'s radius is about 1.74 E 6 m and its mass is 7.35 E 22 kg ok aparently there\'s an easier way to do this I applied Newtons second law in the radial direction net force … 
Physics
Hi, I had some questions about Physics and Newton’s Three Laws of Motion and was wondering if someone could possibly help me. I wasn't sure if my answers were correct and I need to make sure they are. #1 Write out in words what “acceleration … 
Physics
A Ferris Wheel, 24.0 m in diameter, rotates once every 12.5s. What is the fractional change in a person's apparent weight: a) at the top, and b) at the bottom? 
Physics
A dragster and a driver together have mass of 942.2 kg. the dragster starting from rest attains a speed of 25.5m/s in 0.56 s. 1. find the average acceleration of the dragster during this time interval? 
Physics
A tugboat pulls a ship with a constant horizontal force of 6000N and causes the ship to move through a harbor. The water exerts a constant drag force on the ship of 500N. How much work is done on the ship if it moves a distance of … 
Science physics
mandy drops a 2.0kg book from a height of 4.5m. how much work has gravity done on the book?