Intensive English Comp I (110)

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Tuesday, November 15, 2021 Intro. Concepts in Physics 1

Midterm Exam

Submit this exam during the exam submission date. Present each solution logically and

coherently for full credit. You will receive partial credit only if your works merits it.

Exam Due

Thursday November 18th

Problem 1 (5 points) You are applying a force of 650 N to budge a 110-kg desk, which is resting on the floor. The

coefficient of static friction between the desk and the floor is 0.8. What is the magnitude of the

frictional force?

Problem 2 (5 points) A ball is thrown horizontally at a speed of 20 m/s over level ground

a) If it starts out at a height of 19.6 m, how long does it take for the ball to reach the

ground?

b) How far will it move horizontally in this time?

Problem 3 (5 points) Round the following answers to 3 significant digits:

a) 5.82 × 10!/1.22 × 10"

b) 2.34 × 10#! ⋅ 8.76 × 10$

Problem 4 (5 points) What is the average acceleration of a ball that is thrown vertically upward on the Moon with a

speed of 2 m/s if it takes 2.5s to return?

Name: Midterm: Take Home

Tuesday, November 15, 2021 Intro. Concepts in Physics 2

Problem 5 (5 points) Io, one of Jupiter’s many moons, orbits the giant planet in a nearly circular orbit of radius

422,000 km. The period for the orbit is 1 day, 18 hours, and 28 minutes. What is Io’s average

centripetal acceleration?

Problem 6 (5 points) A Ford Escort can cover 0.25 mile from a standing start in 19.4s and be going 69 mph at the

finish

a) What is the average acceleration?

b) What is the average speed?

Problem 7 (5 points) Given that there are 2.54 cm in 1 in. How many centimeters are there in 1 ft?

Problem 8 (5 points) What is the gravitational force on a 1-kg mass in the space shuttle when it is 300 km above

Earth’s surface?

Problem 9 (5 points) Draw a free-body diagram for an 800-N parachutist at a time when the air resistance is 400 N. Problem 10 (5 points) A football is thrown with a vertical speed of 9.8 m/s and a horizontal speed of 15 m/s. How far

down field should the wide receiver be to catch this pass?

Name: Midterm: Take Home

Tuesday, November 15, 2021 Intro. Concepts in Physics 3

Problem 11 (5 points) A biker travels 60 miles in 4h. What is the biker’s average speed in m/s?

Problem 12 (5 points) What is a speed limit of 100 km/h expressed in m/s?

Problem 13 (5 points) What is the orbital velocity of a satellite with an orbital radius equal to twice Earth’s radius?

What is the orbital period?

Problem 14 (5 points) The acceleration due to gravity on the surface of Mars is 3.73 m/s2. Given that Mars’s radius is

3400 km, calculate Mars’s mass.

Problem 15 (5 points) A rope is used to pull a 20-kg block across the floor with an acceleration of 3 m/s2. If the tension

in the rope is 160 N, what is the coefficient of sliding friction between the floor and the block?