Math Pretest for Introductory Physics

Order the following units from the largest to smallest:

1 cm(centimeter), 1 meter, 1 foot, 1 inch

• 1 foot, 1 inch, 1 cm(centimeter), 1 meter

• 1 meter, 1 foot, 1 inch, 1 cm(centimeter)

• 1 foot,1 cm(centimeter), 1 meter, 1 inch

• 1 meter, 1 foot, 1 cm(centimeter), 1 inch

Let y = 5x²

What is the value of y when x = 2?

• 10

• 100

• 20

• 54

If V = I R then R = ______ ?

• $R=\frac{V}{I}$

• $R=VI$
  

• $R=\frac{I}{V}$

• $R=\frac{1}{IV}$

Sam is driving to college at a constant speed of 60 mph (miles per hour). What distance has he driven in 3 hours?

• 20 miles

• 180 hours

• 20 hours

• 180 miles

The graph shows the cost of potatoes as a function of weight. (Clicking the magnifier icon makes the graph larger)

What is the price of 1 kg of potatoes?

• 100 R

• 50 R

• 20 R

• Can not be determined from the graph.

Which of the following objects could have a height of 10 m (meters)?

• A building

• A person

• A water bottle

• A paper clip

Two pots of different sizes are placed on a two identical fire pits for the same amount of time, as shown . Which pot  receives more heat from the fire?

• The larger one
  

• The smaller one
  

• Can not answer with the information given
  

• Both pots receive the same heat
  

The number of daffodils at a store is 36. Fred bought one

third of them, but only kept half of those for himself. How many of the daffodils did Fred give away?

• One third of 36 is 6 and half of that is 3, so he gave away 3 daffodils.

• One half of one third is one sixth, and one sixth of 36 is 6, so he gave away 6 of them.

• One half of 36 is 12 and one third of that is 4, so he gave away 4 daffodils.

• One third of one half is two-thirds, and two-thirds of 36 is 18, so he gave away 18 daffodils.

One tall staircase travels up 20 meters in 150 steps. Another shorter staircase travels up 8 meters in 50 steps. Which one is steeper?

• The tall one is steeper because it goes higher.

• The short one is steeper because it goes up 0.16 meters every step.

• The short one is steeper because it has less steps.

• The tall one is steeper because it takes 7.5 steps to go up one meter.

Jill and Jasper start at one corner of a field. Jill walks 40

meters North and Jasper walks 30 meters East. By how many meters are they apart?

• 70 meters, because of addition

• 35 meters, because it's the average

• 50 meters, because of the Pythagorean theorem

• 120 meters, because of multiplication