word problems
a 15 kg object has an acceleration of 3 m/s2
what is the net force acting on it?
45 N
What is the mass of a 75 N dog?
7.5 kg
What is the weight of 75 kg of dog?
750 N
what's newtons first name?
Issac
5 x 69
345
a force of 21 N gives an object of unknown mass an acceleration of 3 m/s2
what's its mass?
7 kg
A bird is sitting at rest on the branch of a tree. What is the net force on the bird?
0 N
A force of 200 N is just sufficient to start a 50 kg steel trunk moving across a wooden floor.
Find the
coefficient of static friction?
0.4
when did he invent the laws?
1665
200 x 200
40,000
A 30 kg mass at rest is suspended from a string.
Draw a neat, labeled FBD of the forces acting on the mass.
0 N
What would be the weight of an apple on the moon if it has a mass of 0.9 kg? Remember, the acceleration due to gravity on the moon is 1/6 that on Earth.
1.5 N
A force of 5.0 N to the left causes a 1.35 kg book to have a net acceleration of 0.76 m/s2 to the left.
What is the frictional force acting on the book?
3.97 N to the right
what is newtons first law?
35,000 x 3
105,000
A 20 kg ball rolls with an acceleration of 3 m/s2 to the right.
What is the net force acting on the object?
60 N
If the coefficient of friction is 0.3, determine the force of friction acting on a 15 kg block sliding on a horizontal surface.
45 N
A crate with a mass of 125 kg is accelerated upward at 0.45 m/s2 by means of a cable.
Calculate the weight of the crate.
1250 N
what is newtons 2nd law?
Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.
600 x 80
48,000
a skier leaves the horizontal end of the ramp with the velocity of 25 m/s and lands 70 meters from the base of the ramp.
how high is the end of the ramp above the landing area?
39.2 M
The figure shows the same two blocks, m1 and m2, from the previous problem but now suspended by a
string on either side of a frictionless pulley.
Find the accelerations of the two blocks.
3.0 m/s2
A 600 N child riding Mr. Freeze at Six Flags.
For each case: (1) Draw the free-body diagram and (2) calculate the apparent weight of the child.
Ascending at a constant vertical velocity of 3 m/s?
600 N
what is newtons 3rd law?
His third law states that for every action (force) in nature there is an equal and opposite reaction. If object A exerts a force on object B, object B also exerts an equal and opposite force on object A. In other words, forces result from interactions.
3,000 x 3,000
9,000,000