# AP Physics with Hansenator - Quarter 1 Exam - Forces, Kinemaitcs, and More

Hello Every One! A test I gave to my Physics students this semester. I included a bonus that you may see soon on Energy! Solutions to this test will be posted tomorrow. Enjoy the fun and feel free to use it in your classroom!

## Physics Kinematics and Forces Test

#### True/False (Make sure your answer is clear)

- When summing Cartesian vectors the resultant vector is of the form <x_1+x_2,y_1+y_2>.
- When a ball is thrown, at the top of the curve the acceleration in the y direction is 0.
- There are 4 significant digits in the number .002016.
- The magnitude of the polar (r,θ) vector <3,200°> is 3.
- The magnitude of the Cartesian (x,y) vector <1,3> is √4.
- When a ball is thrown, at the top of the curve the velocity in the y direction is 0.
- A car moving at 11 m/s for 5 s travels a distance of 11/5 meters.
- When a ball is thrown, the horizontal acceleration is 0.
- x=rsin(θ) and y=rcos(θ).
- Acceleration is defined as the change in velocity over the change in time.
- In projectile motion, the vector for acceleration in the x and y directions is constant.
- When considering projectile motion in the y-direction we use S=1/2 at^2+v_0y t+S_0
- The angle that gives a projectile the farthest distance is 60°.
- Neglecting air resistance, a bowling ball and a feather fall at the same rate.
- If a ball rolls of a table at 5 m/s, the initial velocity in the y direction is 5 m/s.
- The velocity at the top of a curve is zero in the x direction.
- The velocity at the top of a curve is zero in the y direction.
- An object in equilibrium has no forces acting on it.
- An object in equilibrium never moves.
- Newton’s Second Law states an object at rest stays at rest and an object in motion stays in motion unless acted on by an outside force.
- The force of friction is found by multiplying the force of gravity by a frictional constant.
- Kepler’s First Law states that planets move in a circular orbit.
- Static friction determines if an object will begin to move.
- The force of gravity between objects quadruples when the distance between them is cut in half.

#### Short Answer (Include units in you final answers and show all work.)

###### Number 1

Consider the two weights in the pulley system. Find the acceleration of the system.

###### Number 2

A golf ball is hit of a 25.0 m high building at an angle of 12 degrees with an initial velocity of 41.0 m/s. How far does it go horizontally before it hits the ground?

###### Number 3

If you throw a ball with an initial velocity of 3.25 m/s straight up in the air from a height of 10.0 m: (a) how long does it take the ball to reach the top of its motion? (b) How far will the ball rise before it begins to fall?

###### Number 4

Convert each of the following quantities:

(a) 400 cm to m

(b) 50 m to km

(c) 5 mg to g

(d) 5 m/s to ft/min

###### Number 5

Assume the 8.20-kg box moves. Find the acceleration if the kinetic friction is μ=.25.

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