AP Physics 1: Cumulative Test

A ball is thrown and follows the parabolic path shown below.   Air friction is negligible.    Point Q is the highest point on the path.   Points P and R are the same height above the ground. How do the speeds of the ball at the three points compare?

vQ < vP = vR

Which of the following pairs of graphs shows the distance traveled versus time and the speed versus time for an object uniformly accelerated from rest?

The velocity of a projectile at launch has a horizontal component v_h and a vertical component v_y. Air resistance is negligible.  When the projectile is at the highest point of its trajectory, which of the following shows the vertical and horizontal components of its velocity and the vertical component of its acceleration?

DA car starts from rest and accelerates as shown in the graph below. At what time would the car be farthest from its original starting position?

A car starts from rest and accelerates as shown in the graph below. At what time would the car be farthest from its original starting position?

8 seconds

The diagram below shows four cannons firing shells with different masses at different angles of elevation. The horizontal component of the shell's velocity is the same in all four cases. In which case will the shell have the greatest range if air resistance is neglected?

Cannon D

A ball which is dropped from the top of a building strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the building is approximately:

45 m

In the absence of air resistance, if an object were to fall freely near the surface of the Moon,

the acceleration is constant.

When an object falls freely in a vacuum near the surface of the earth

the acceleration will remain constant

Two arrows are launched at the same time with the same speed. Arrow A at an angle greater than 45 degrees, and arrow B at an angle less than 45 degrees. Both land at the same spot on the ground. Which arrow arrives first?

arrow B arrives first

The accompanying graph describes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a negative velocity? 

from t = 4.8 s to t = 6.2 s and from t = 6.9 s to t = 10.0 s only

The accompanying graph describes the motion of a toy car across the floor for 10 seconds. What is the acceleration of the toy car at t = 4 s? 

1 m/s²

An object is thrown upwards with a velocity of 30 m/s near the surface of the earth. After two seconds what would be the direction of the displacement, velocity and acceleration? 

B

Which of the following graphs could correctly represent the motion of an object moving with a constant speed in a straight line? 

Graphs I and IV only

Three stones of different mass (1m, 2m & 3m) are thrown vertically upward with different velocities (1v, 2v & 3v respectively). The diagram indicates the mass and velocity of each stone. Rank from high to low the maximum height of each stone. Assume air resistance is negligible.

III, II, I

A snail is moving along a straight line.  Its initial position is xₒ = –5 meters and it is moving away from the origin and slowing down.  In this coordinate system, the signs of the initial position, initial velocity and acceleration, respectively, are

B

The magnitude of the force of gravity acting on an object is called

Weight

A car goes forward along a level road at a constant velocity. The additional force needed to bring the car into equilibrium is

Zero

What is Newton’s First Law of Motion?

An object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity, unless acted on by an outside force.

What is Newton’s Second Law of Motion?

F = ma

What is Newton’s Third Law of Motion?

For every action force there is an equal and opposite reaction force

What is another name for Newton’s 1st Law of motion?

The law of inertia

Who came up with the 3 fundamental laws of motion / forces?

Newton

A plane 5 meters in length is inclined at an angle of 37°, as shown.   A block of weight 20 N is placed at the top of the plane and allowed to slide down. The magnitude of the normal force exerted on the block by the plane is

greater than zero but less than 20 N

Multiple correct: Three forces act on an object. If the object is moving to the right in translational equilibrium, which of the following must be true?  Select two answers.

The vector sum of the three forces must equal zero.

The object must be moving at a constant speed.

A rope of negligible mass supports a block that weighs 30 N, as shown.  The breaking strength of the rope is 50 N.  The largest acceleration that can be given to the block by pulling up on it with the rope without breaking the rope is most nearly 

6.7 m/s²

Three blocks of masses 3m, 2m, ands are connected to strings A, B, and C as shown above. The blocks are pulled along a rough surface by a force of magnitude F exerted by string C. The coefficient of friction between each block and the surface is the same. Which string must be the strongest in order not to break?

C

A student pulls a wooden box along a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must be true? 

P > f and N < W

The 10.0 kg box shown in the figure below is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinetic friction between the box and the floor is 0.20. The box is moving with:

acceleration to the left.

Two blocks of mass 1.0 kg and 3.0 kg are connected by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is negligible, what is the value of F? 

8.0 N

A 6.0 kg block initially at rest is pushed against a wall by a 100 N force as shown.  The coefficient of kinetic friction is 0.30 while the coefficient of static friction is 0.50.  What is true of the friction acting on the block after a time of 1 second?

Kinetic friction acts downward on the block.

A crate of toys remains at rest on a sleigh as the sleigh is pulled up a hill with an increasing speed.  The crate is not fastened down to the sleigh.  What force is responsible for the crate’s increase in speed up the hill?  

the force of static friction of the sleigh on the crate

A ball attached to a string is whirled around in a horizontal circle having a radius R.  If the radius of the circle is changed to 4R and the same centripetal force is applied by the string, the new speed of the ball is which of the following?

Twice the original speed

A racing car is moving around the circular track of radius 300 meters shown below. At the instant when the car's velocity is directed due east, its acceleration is directed due south and has a magnitude of 3 meters per second squared. When viewed from above, the car is moving

clockwise at 30 m/s

Multiple Correct: In which of the following situations would an object be accelerated? Select two answers

It moves with uniform circular motion.

It travels as a projectile in a gravitational field with negligible air resistance.

A car initially travels north and then turns to the left along a circular curve. This causes a package on the seat of the car to slide toward the right side of the car. Which of the following is true of the net force on the package while it is sliding?

There is not enough force directed toward the center of the circle to keep the package from sliding.

Inside a washing machine, the radius of the cylinder where the clothes sit is 0.50 m. In one of its settings the machine spins the cylinder at 2.0 revolutions per second. What is the acceleration of an item of clothing?

79 m/s²

A figure of a dancer on a music box moves counterclockwise at constant speed around the path shown below. The path is such that the lengths of its segments, PQ, QR, RS, and SP, are equal.     Arcs QR and SP are semicircles. Which of the following best represents the magnitude of the dancer's acceleration as a function of time t during one trip around the path, beginning at point P ? 

The diagram below is a snapshot of three cars all moving counterclockwise during a one lap race on an elliptical track. Which car has had the lowest average speed during the race so far? 

Car C

The diagram below is a snapshot of three cars all moving counterclockwise during a one lap race on an elliptical track. Which car at the moment of the snapshot MUST have a net force acting on it?

all three cars have net forces acting on them

Riders in a carnival ride stand with their backs against the wall of a circular room of diameter 8.0 m. The room is spinning horizontally about an axis through its center at a rate of 45 rev/min when the floor drops so that it no longer provides any support for the riders. What is the minimum coefficient of static friction between the wall and the rider required so that the rider does not slide down the wall?

0.11

A person weighing 800 newtons on Earth travels to another planet with twice the mass and twice the radius of Earth. The person's weight on this other planet is most nearly

400 N

If F1 is the magnitude of the force exerted by the Earth on a satellite in orbit about the Earth and F2 is the magnitude of the force exerted by the satellite on the Earth, then which of the following is true?

F1 is equal to F2.

A newly discovered planet has twice the mass of the Earth, but the acceleration due to gravity on the new planet's surface is exactly the same as the acceleration due to gravity on the Earth's surface. The radius of the new planet in terms of the radius R of Earth is

(√2)R

An object has a weight W when it is on the surface of a planet of radius R. What will be the gravitational force on the object after it has been moved to a distance of 4R from the center of the planet?

(1/16)W