Physics Test 1 Practice Problems

A car starts with a velocity of 20 m/s and reach to a stop in 5 seconds. The average acceleration of the car is... a. zero m/s2 b. -1.0 m/s2 c. 4.0 m/s2 d. -10,0 m/s2 e. -4.0 m/s2

-4.0 m/s2

A student releases a ball from rest (zero) on an inclined plane and measures that is travels a distance of 5 m in a time of 2.0 s. The acceleration of the ball is... a. 0.10 m/s2 b. 0.25 m/s2 c. 2.5 m/s2 d. 1.25 m/s2

1.25 m/s2

A car is moving on a highway with a speed of 60 m/s. 5 seconds later the car is moving at 10 m/s in the same direction. The magnitude of the car's acceleration is.... a. -10 m/s2 b. 0 c. 10 m/s2 d. 14 m/s2

10 m/s2

A student releases a ball from rest (zero) on an inclined plane and measures that is travels a distance of 5 m in a time of 2.0 s. The velocity of the ball after 2 seconds is... a. 10 m/s b. 0.25 m/s c. 2.5 m/s d. 1.0 m/s

2.5 m/s

A car starts from rest and reaches 20 m/s in 5 seconds. The average acceleration of the car is.... a. zero m/s2 b. 1.0 m/s2 c. 2.0 m/s2 d. 4.0 m/s2 e. 10.0 m/s2

4.0 m/s2

Which of the following statements is an observation of the natural world? a. there are no prime numbers that have zero for the last digit b. Galileo was the greatest scientist c. i saw the moon rise at 6:25pm yesterday d. the US Naval Observatory says that the moon rose at 6:25pm yesterday

I saw the moon rise at 6:52pm yesterday

Assume the x-axis to ba an East-West line with positive direction pointing East. A car is moving East with a speed of 30 m/s. The driver realizes that he forgot something at home. She stops the car, and turns around, moving West with a speed of 30 m/s. Under these assumptions, what is the velocity before and after turning around? a. the same b. positive before, negative after turning around c. negative before, positive after turning around d. neither of above answers

Positive before, negative after turning around

An object undergoing free fall experiences... a. an increase in its acceleration b. a decrease in its acceleration c. a constant acceleration

a constant acceleration

A quantity that is a measure of how the velocity of a body changes with time is... a. distance b. speed c. acceleration d. time

acceleration is change in velocity over time

Which of these is not important to the development of scientific explanations? a. measurement b. communication c. debate d. all of these are important

all of these are important

A reporter at the newspaper says that she saw a full moon last night. That statement is most likely... a. an actual observation of the natural world b. a proven mathematical theorem c. an unsupported opinion of the newspaper editor

an actual observation of the natural world

A ball is thrown straight up. It reaches its highest point and then falls back. Which of the following is the correct statement? a. throughout its motion, the ball's velocity is zero b. at the highest point in its motion, the ball's acceleration is zero c. at the highest point in its motion, the ball's velocity is zero d. throughout its motion, the ball's acceleration is zero e. at the highest point in its motion, the ball's velocity and acceleration are zero

at the highest point in it's motion, the ball's velocity is zero

In a laboratory on Earth, all the air is pumped from a large tube. A feather and a steel ball are simultaneously released from rest inside the tube. What happens next? a. both objects float weightless inside the tube b. the steel ball falls and hits the bottom before the feather c. the feather falls and hits the bottom before the steel ball d. both objects fall and hit the bottom at the same time

both objects fall and hit the bottom at the same time

A car driver takes Turn 1 at Daytona International Speedway at a steady 120 mph all the way through the turn. The radius of this turn is 1000 feet. Which statement is true? a. its velocity is constant because its speed is constant b. its speed is constant, so its acceleration is zero c. change of direction at constant speed means a change in velocity d. its velocity changes only if its speed decreases

cahnge of direction at constant speed means a change in velocity

What is the difference between distance and displacement? a. displacement is a vector and distance is a scalar b. there is no difference, they are both scalars c. there is no difference, they are both vectors d. displacement is a scalar and distance is a vector

displacement is a vector and distance is a scalar

A body released from rest falls with an acceleration of 9.8 m/s2. If the same body is thrown upward at an angle, air resistance is negligible, its acceleration after release will be... a. downward and less than 9.8 m/s2 b. downward and equal to 9.8 m/s2 c. downward and greater than 9.8 m/s2 d. upward and equal to 9.8 m/s2 e. upward and greater than 9.8 m/s2

downward and equal to 9.8 m/s2

A freely falling object (neglecting air resistance) has its velocity... a. increase linearly with time b. remain constant c. decrease linearly with time d. increase as the square of time

in crease linearly with time

Which quantity is the highway patrol more interested in? a. average speed b. instantaneous speed

instantaneous speed

The following quantities relate to the rate of change of position. Which pair will always have the same magnitude? a. average speed and average velocity b. average speed and instantaneous speed c. average velocity and instantaneous velocity d. instantaneous speed and instantaneous velocity

instantaneous speed and instantaneous velocity

Suppose a graph of distance traveled by a body versus time is constructed. The slope of the graph at any point may be identified with... a. instantaneous acceleration b. instantaneous velocity c. average acceleration d. average speed

instantaneous velocity

The SI (metric) unit most comparable in size to the US Ibs (pounds) unit is the... a. grams b. kilograms c. pounds d. kilometers

kilograms

Which of the following is not an appropriate unit for measuring acceleration? a. miles/hr/s b. ft/s2 c. m/s d. km/min/s e. m/min2

m/s

A vector has... a. only magnitude b. only direction c. direction and speed d. magnitude and direction

magnitude and direction

The metric unit (SI unit) most coparable in size to the English "inch" unit is the... a. micrometer b. millimeter c. centimeter d. meter e. kilometer

meter

A negative distance implies that an object is... a. on the negative side of the origin b. above the origin c. below the origin d. to the right of the origin

on the negative side of the origin

At night you get in your car to drive to the store. The car starts but none of the lights work. Which of the following activities would not be considered part of the scientific method? a. slam the hood down hard b. check the fuse in the light circuit c. check the wiring from the battery to the lights d. replace the light bulbs with new bulbs

salm the hood down hard

Changing the positive direction in a reference fram to the oppoisite direction does not change the sign of which of the follwoing quantities? a. velocity b. average velocity c. speed d. displacement

speed

Speed is.... a. vector quantity b. a scalar quantity

speed is a scalar quantity

The motion of a falling object is commonly investigated with the aid of a... a. stethoscope b. microscope c. kaleidoscope d. stroboscope

stroboscope

A 10 pound irone ball and a 2 pund iron ball are dropped simultaneously from a height of 100 meter. In real life, which ball will reach the ground first? a. the 10 pound ball b. the 2 pound ball c. they will reach the ground at the same time

the 10 pound ball

An essential feature of a scientific theory is... a. complexity b. the use of mathematics c. the use of specialized language d. the making of predictions that can be tested

the making of predictions that can be tested

The slope of the distance traveled versus time graph is the... a. acceleration b. velocity

velocity

Velocity is.... a. a vector quantity b. a scalar quantity

velocity is a vector

The acceleration of a body is given by the slow of the graph of... a. distance travelled versus time b. time versus velocity c. velocity versus distance travelled d. velocity versus time e. time versus distance travelled

velocity versus time