Great Physics Problems



Fun With Physics

1) An F-16 fighter plane cruises from Allen to New York going Mach 1.5 (1,837Km/hr) in 1.4 hours. How far is it to New York?

d = r X t

r =

t =

d=

2) On the Apollo 11 mission to the moon, it took 3.5 days (73.25 hrs) to reach the moon. The distance from the Earth to the moon is 384,403 Km. How fast were the astronauts traveling on their way to the moon?

s = d ÷ t

r =

t =

s =

3) You drive 557 Km from Dallas to Lubbock in 6.5hrs. The distance from Dallas to Lubbock in a straight line west is 484 Km. What is your velocity?(include direction!

V = D ÷ t

D =

t =

V =

4) An F-14 fighter jet launched off an aircraft carrier travels 300m in 2 seconds and reaches a takeoff velocity of 296 km/hr (82 m/s). What is the acceleration of the aircraft?

a = (V1 – V0) ÷ t

V0 =

V1 =

t =

a =

5) An F-14 fighter jet traveling 241 Km/hr (67 m/s) lands on an aircraft carrier over a distance of 350m. It takes 2.3 seconds for the plane to come to a complete stop. At what rate does the plane accelerate

a = (V1 – V0) ÷ t

V0 =

V1 =

t =

a =

6) Fully loaded and sitting on the launch pad, the space shuttle has a mass of 1,496,854Kg. The shuttle launches with a force of 31,000,000 N. What is the acceleration of the space shuttle? (mass should be in g)

a = f ÷ m

f =

m=

a =

7) On December 17,1903, at Kill Devil Hill, North Carolina, the Wright brothers made the first sustained, controlled powered flight. Their airplane weighed about 700 lbs (317,500g), and they had to accelerate as fast as the force of gravity (9.8 m/s2). What was the force need for them to fly?

F = m X a

m =

a =

F =

8) A Ferrari F430 has a mass of 1450 Kg. And can go from 0 to 100 Km/hr in 4 seconds. What is the force needed to achieve this? (mass should be in g)

a = (V1 – V0) ÷ t

F = m X a

V0 =

V1 =

t =

m =

a =

9) A car is traveling at an average speed of 70. m/s. How many km would the car travel in 6.5 hours? (need to convert)

10) A biker begins to move from a speed 0.0m/s to a final speed of 25.0m/s in 10 seconds. What is the acceleration

11) A skater increases her velocity from 2.0m/s to 10.0m/s in 3.0 seconds. What is the acceleration of the skater?

12) While traveling along the highway a driver slows from 24m/s to 15m/s in 12 seconds. What is the driver’s acceleration (remember that a negative value indicates a slowing down or “deceleration”)

13) A parachute on a dragster racing-car opens and changes the speed of the car from 85m/s to 45m/s in a period of 4.5 seconds. What is the acceleration of the car?

14) The fastest land mammal, the cheetah, can accelerate from 0m/s to 31.3m/s in 3 seconds. What is the acceleration of the cheetah?

15 What net force is needed to accelerate a train at 2m/s2, if the train weighs 10000 N?

16) A car goes 25 m, east, in 5 min. What is its speed? Its velocity?

17) A 1 kg ball is dropped from the top of a cliff and falls with a constant acceleration due to gravity (9.8 m/s2). What is the force of the falling ball? (Remember - mass should be in what units?)

18) Billy the Kid is escaping the law on horse back, Billy covers 40 Km in 6 hours. At what speed is Billy the Kid’s horse running?

19) Geronimo jumped off a cliff and accelerated due to gravity (9.8m/s2). Geronimo has a mass of 84 Kg. What is the force of Geronimo’s fall?

20) Crazy Horse shoots an arrow with an average speed of 85 m/s. The arrow travels for 13 seconds. How far did Crazy Horse’s arrow travel?

21) A team of horses accelerates a 680 Kg stage coach at 0.2m/s2. What is the force at which the horses are pulling?

22) The diagram represents the total travel of a teacher on a Saturday. Which part of the trip is made at the greatest average speed?

[pic]

23) This table shows the movement of a snail over an 8-hour period. If the snail traveled at the same pace the entire time, how far did it travel in 6 hours?

24) How much force is needed to accelerate a 1,300 kg car at a rate of 1.5 m/s 2?

25) A swimmer swims 20 m in 40 s. What is the swimmer’s average speed?

26) An Airplane is descending to land at the airport. During its descent it had to fly in circles until the landing was cleared of other planes. Explain what is occurring during each of the segments

. A to B

B to C

C to D

27) Jen left her house and drove to school in the morning, as shown in the accompanying graph. On her drive to school she realized that she forgot her bookbag and had to return home before driving back to school for a 3 hour class. Explain what is happening during each part of the graph below.

A to B

B to C

C to D

28) The accompanying graph shows Marie’s distance from home (A) to work (F) at various times during her drive.

[pic]

a Marie left her briefcase at home and had to return to get it. State which point represents when she turned back around to go home and explain how you arrived at that conclusion.

b Marie also had to wait at the railroad tracks for a train to pass. How long did she wait?

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