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