newton's second law.

Question 1

what does this second law tell us about acceleration of an object and the resultant force?

Answer 1

acceleration of an object is directly proportional to the resultant force acting on it and is inversely proportional to the mass of an object.

Question 2

what does this mean: acceleration of an object is directly proportional to the resultant force acting on it?

Answer 2

the larger the force the larger the acceleration and the larger the mass the smaller the acceleration for a given resultant force.

Question 3

what is the equation associated with this?

Answer 3

force= mass × acceleration.
F= ma.

Question 4

acceleration and force: on a graph labelled acceleration and force what does a straight line through the origin show?

Answer 4

acceleration is directly proportional to the resultant force.

Question 5

acceleration and mass: on a graph labelled acceleration and mass what does a straight line not going through the origin show and what is the associated formula?

Answer 5

acceleration is directly proportional to 1/mass.
a= constant/mass.

Question 6

what is a common problem with using a stop clock for getting accurate times, what is the name for the error and how can we help minimise the impact?

Answer 6

reaction time is a source of error.
random error.
calculate an average.