Physics- Test 1 Review
For box on floor with force directed below horizontal don't forget to
Remember Fy of force must be added to normal force when finding force of friction
When doing F=ma problems remember you can combine either side with other = equations and that the f applies to the force on obj not both
True
Always use the longer constant acceleration formulas
true
A box slides down a frictionless plane inclined at an angle θ above the horizontal. The gravitational force on the box is directed
vertically
Problem with sign hanging
1) find net forces on x and net forces on y / set equal to zero then combine to solve for tension forces Remember to use (Fcostheata) ->components
What is the product of 11.24 and 1.95 written with the correct number of significant figures?
21.9
What is the sum of 1.53 + 2.786 + 3.3 written with the correct number of significant figures?
7.6
A rabbit trying to escape a fox runs north for 8.0 m, darts northwest for 1.0 m, then drops 1.0 m down a hole into its burrow. What is the magnitude of the net displacement of the rabbit?
8.8
A pilot drops a package from a plane flying horizontally at a constant speed. Neglecting air resistance, when the package hits the ground the horizontal location of the plane will
Be over the package
A fish weighing 16 N is weighed using two spring scales, each of negligible weight, as shown in the figure. What will be the readings of the scales?
Each will read 16N
Question where a ball (tennis ball) is hit given initial velocity and angle / asking how fast at highest point
It'll be the Vx component for the answer
A woman is straining to lift a large crate, without success because it is too heavy. We denote the forces on the crate as follows: P is the upward force the woman exerts on the crate, C is the vertical contact force exerted on the crate by the floor, and W is the weight of the crate. How are the magnitudes of these forces related while the woman is trying unsuccessfully to lift the crate?
P + C = W
Airless planet
Use equation
Projectile leaves ground, given vi and max height reached
Use equation
For the problem where the car is traveling at a speed when driver suddenly applies the brakes
Use equation to solve for velocity
Boy licks football, given vi and angle
Use formula
Batter hits ball, given x distance and angle
Use formula to solve
For problem with puppy and two hanging masses
Use kin equation x/y = and eq for a
For a item thrown off hill horizontally
Use v^2 function to solve for a then use x/y = function to solve for unknown
A stalled car is being pushed up a hill at constant velocity by three people. The net force on the car is
zero