Monday
November 24, 2014

Homework Help: physics- please help

Posted by Emma on Sunday, April 29, 2012 at 4:55pm.

World-class sprinters can accelerate out of the starting blocks with an acceleration that is nearly horizontal and has magnitude 15m/s^2 .
Part a)How much horizontal force F must a sprinter of mass 60kg exert on the starting blocks to produce this acceleration? express your answer in newtons
Part b)
Which body exerts the force that propels the sprinter, the blocks or the sprinter?

question # 2: net force of 225 N accelerates a bike and rider at 2.65m/s^2. What is the mass of the bike and rider together ?

Thank you .

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - Three identical blocks connected by ideal strings are being pulled ...
physics - A block of mass 4.0 kg is put on top of a block of mass M = 6.0 kg. To...
Physics - Three blocks rest on a frictionless, horizontal table (see figure ...
college physics - Two blocks of masses m1 = 4.00 kg and m2 = 3.00 kg are placed ...
Physics-Mechaincs - A force of 23.52 N pushes and pulls to blocks as shown in ...
Physics - Two blocks connected by a string are pulled across a rough horizontal ...
physics - Three blocks are in contact with each other on a frictionless ...
Physics. - A block of mass 3m is placed on a frictionless horizontal surface, ...
physics - Two blocks, joined by a string, have masses of 6 and 9kg. They rest on...
physics - A force of magnitude 25Nis directed at an angle of 37 deg above the ...

Search
Members