help with my physics homework ASAP!! i cant understand them!?

Question

#1) A force is applied to a 1.6 kg mass and produces 2.8 m/s^2 acceleration.
What acceleration would be produced by the same force
applied to a 14.5 kg mass? in units of m/s^2.
#2)A dragster and driver together have mass 892.3kg .The dragster, starting from rest, attains a speed of 25.9 m/s in 0.6s.
Find the average acceleration of the dragster during this
time interval. in units of m/s^2 .
What is the size of the average force on the dragster
during this time interval? in units of N
The driver has a mass of 77.8 kg. What horizontal force does the seat exert on the driver? in units of N
#3)A person of mass 72.3 kg escapes from a burning building by
jumping from a window situated 38.9 m above a catching net. The acceleration of gravity is 9.8m/s^2. If air resistance exerts a force of 85.3 N on him as he falls, determine his speed just before he hits the net. in units of m/s.

Answer 1

you should google acceleration + physics, they'll prolly give u da formula, and juss plug everything in. dats how i passed

Answer 2

1) The force is F
F = m*a = 1.6 kg*2.8 m/s^2
The same F is applied to the larger mass.
F = 1.6 kg*2.8 m/s^2 = 14.5 kg*a
Solve for a.

2) Use the common equation of motion (you were probably give 4 to work with)
V = Vo + a*t
where Vo = 0 in this case. Plug in what you know and you can solve for a.
Use that a in F = m*a. (Newtons are the same as kg*m/s^2)
Again, use that a in F = m*a. In this case, m is just the driver.

3) You have to find the net force on him. One force is his weight
W = m*g
The air resitance is a force in the opposite direction. The net force is the difference in the 2 forces.
Fnet = m*a
V^2 = Vo^2 + 2*a*h

Answer 3

Looks like F=ma and some simple algebra will solve all these problems.