9. Pressing the brake pedal slows a car down from a velocity of 35 m/s to 20 m/s in 8.0 s. Calculatethe acceleration of the car (the acceleration is in the opposite direction to the velocity - a negativeacceleration or deceleration).10. Taipei 101 is the tallest building in the world at 508 m (101 stories). Free fall acceleration is about9.8 m/s?. If a stone could be dropped from the top of the tower, how fastwill it be moving when it hits the street? Give your answer in km/h.11. Taipei 101 also has the world's fastest elevators. These can transportpassengers to the 89th-floor (382 meter high) observatory in a mere 39seconds. The maximum speed of the elevator is 1010 metres-per-minute.What is the average speed of the elevator in km/h?12. A bullet leaves the end of a rifle barrel (the muzzle) with a velocity of4.0 x 10² m/s, 3.0 ms (milliseconds) after the rifle is fired. The rifle barrel is65 cm long.a) What is the barrel length in metres?b) What is the initial speed of the bullet?c) How long does it take the bullet to travel the length of the gun barrel inseconds?d) What is the acceleration of the bullet while travelling down the gunTaipei 101barrel?e) What is the muzzle velocity in km/h?13. "Rate of change of velocity" means the same as14. A term that means "rate of change of position" is15. The word that means "change of position" is16. The hare and the tortoise agreed to a rematch. The race distanceis 100 m. The tortoise ran at a constant 5.2 cm/s. The hare ran fullBullet Leaves the Rifle Muzzlespeed at 0.40 m/s for the first 75 m but then, with the finish line justahead, the rabbit stopped for a "quick" nap. After sleeping for 28minutes, the hare resumed the run at 0.4 m/s.a) which beast won the race?b) What was the winning time (At)?c) How much time did the looser loose by?d) How far behind was the looser when the winner hit the tapeat the finish?ANSWERS1) 1620 and 3.01 m/s2) 13 m, east (-13 m), 20 m, east (+20 m), 4 m/s, east (+4 m/s)3) 11.2 m/s4) 6.6 km, 3.3 km/h, 4.2 km (west), 2.1 km/h (west)5) 2.1 h7) 0.389 s10) 360 km/h12) 0.65 m, 0, 3.0 x 10 s, 1.3 x 10' m/s², 1400 km/h13) acceleration16)6) 0.29 s, 2.06 h8) 18 m/s11) 35 km/h9) -1.9 m/s"On Your Mark..."14) velocity15) displacement Physics 30SScience & Technology2240 Grant Ave. Winnipeg. MB R2C IL6Shaflesbury High SchoolMotion: Speed/Velocity & AccelerationAdV =Ata =Average Velocity,1. A man jogs 5.0 km (5000 m) in 27 minutes.a) What is the time interval (At) in seconds?b) Calculate his average speed in metres per second (m/s).Average Acceleration,At2. An object has a position of 13 metres west. 5.0 seconds later it's at 7 metres east.a) What was the initial position?b) What was the change of position or displacement (Ad)?c) What was the average velocity?3. A world class sprinter runs 100.0 m in 8.90 s. What was his average speed?4. A hiker gets lost in a forest. He walks half-way around a circle with a radius of 2.1 km in 2.0hours.a) What distance did he walk?b) What was his average speed?c) What was his displacement?d) What was his average velocity?WESC-2rr5. A car has an average highway speed of 90 km/h or 25 m/s. At this speed; how long will it take todrive to Kenora which is 190 km away? (Be sure to use common units.)6. Sound travels at 340 m/s. How long does it take the soundof a starter's pistol shot to travel 1.0 x 102 m?The Concorde, supersonic airliner cruises at 2500 km/h.How long does it take to fly from New York City to LondonEngland; a distance of 5150 km?Concorde in Supersonic Cruise7. The fastest slapshot recorded was by Al Iafrate in1993 at 169.3 km/h. Assume this is the average speed ofthe puck as it travels from the blue line to the goal, aminimum distance of 18.3 m (60 feet). How long does thegoalie have to react to the shot? (Average human reactiontime is roughly 0.15 s)8. A skier starts down a slope at a velocity of 4.0 m/s.If she accelerates at a constant rate of 2.0 m/s²; find hervelocity 7.0 s later.From the Movie Classic, Slap Shot

Answered: Image /qna-images/answer/5e1db53b-9a66-4c9a-bee9-dcc1b421ec17.jpg

Answered: 1. A man jogs 5.0 km (5000 m) in 27…

1. A man jogs 5.0 km (5000 m) in 27 minutes. a) What is the time interval (At) in seconds? b) Calculate his average speed in metres per second (m/s).

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Units and Dimensions

These are generally defined as the terms which precede or describes the dimensions further. These are also further divided into two parts namely fundamental units and the derived units.

Question

9. Pressing the brake pedal slows a car down from a velocity of 35 m/s to 20 m/s in 8.0 s. Calculate
the acceleration of the car (the acceleration is in the opposite direction to the velocity - a negative
acceleration or deceleration).
10. Taipei 101 is the tallest building in the world at 508 m (101 stories). Free fall acceleration is about
9.8 m/s?. If a stone could be dropped from the top of the tower, how fast
will it be moving when it hits the street? Give your answer in km/h.
11. Taipei 101 also has the world's fastest elevators. These can transport
passengers to the 89th-floor (382 meter high) observatory in a mere 39
seconds. The maximum speed of the elevator is 1010 metres-per-minute.
What is the average speed of the elevator in km/h?
12. A bullet leaves the end of a rifle barrel (the muzzle) with a velocity of
4.0 x 10² m/s, 3.0 ms (milliseconds) after the rifle is fired. The rifle barrel is
65 cm long.
a) What is the barrel length in metres?
b) What is the initial speed of the bullet?
c) How long does it take the bullet to travel the length of the gun barrel in
seconds?
d) What is the acceleration of the bullet while travelling down the gun
Taipei 101
barrel?
e) What is the muzzle velocity in km/h?
13. "Rate of change of velocity" means the same as
14. A term that means "rate of change of position" is
15. The word that means "change of position" is
16. The hare and the tortoise agreed to a rematch. The race distance
is 100 m. The tortoise ran at a constant 5.2 cm/s. The hare ran full
Bullet Leaves the Rifle Muzzle
speed at 0.40 m/s for the first 75 m but then, with the finish line just
ahead, the rabbit stopped for a "quick" nap. After sleeping for 28
minutes, the hare resumed the run at 0.4 m/s.
a) which beast won the race?
b) What was the winning time (At)?
c) How much time did the looser loose by?
d) How far behind was the looser when the winner hit the tape
at the finish?
ANSWERS
1) 1620 and 3.01 m/s
2) 13 m, east (-13 m), 20 m, east (+20 m), 4 m/s, east (+4 m/s)
3) 11.2 m/s
4) 6.6 km, 3.3 km/h, 4.2 km (west), 2.1 km/h (west)
5) 2.1 h
7) 0.389 s
10) 360 km/h
12) 0.65 m, 0, 3.0 x 10 s, 1.3 x 10' m/s², 1400 km/h
13) acceleration
16)
6) 0.29 s, 2.06 h
8) 18 m/s
11) 35 km/h
9) -1.9 m/s
"On Your Mark..."
14) velocity
15) displacement

Physics 30S
Science & Technology
2240 Grant Ave. Winnipeg. MB R2C IL6
Shaflesbury High School
Motion: Speed/Velocity & Acceleration
Ad
V =
At
a =
Average Velocity,
1. A man jogs 5.0 km (5000 m) in 27 minutes.
a) What is the time interval (At) in seconds?
b) Calculate his average speed in metres per second (m/s).
Average Acceleration,
At
2. An object has a position of 13 metres west. 5.0 seconds later it's at 7 metres east.
a) What was the initial position?
b) What was the change of position or displacement (Ad)?
c) What was the average velocity?
3. A world class sprinter runs 100.0 m in 8.90 s. What was his average speed?
4. A hiker gets lost in a forest. He walks half-way around a circle with a radius of 2.1 km in 2.0
hours.
a) What distance did he walk?
b) What was his average speed?
c) What was his displacement?
d) What was his average velocity?
WE
S
C-2rr
5. A car has an average highway speed of 90 km/h or 25 m/s. At this speed; how long will it take to
drive to Kenora which is 190 km away? (Be sure to use common units.)
6. Sound travels at 340 m/s. How long does it take the sound
of a starter's pistol shot to travel 1.0 x 102 m?
The Concorde, supersonic airliner cruises at 2500 km/h.
How long does it take to fly from New York City to London
England; a distance of 5150 km?
Concorde in Supersonic Cruise
7. The fastest slapshot recorded was by Al Iafrate in
1993 at 169.3 km/h. Assume this is the average speed of
the puck as it travels from the blue line to the goal, a
minimum distance of 18.3 m (60 feet). How long does the
goalie have to react to the shot? (Average human reaction
time is roughly 0.15 s)
8. A skier starts down a slope at a velocity of 4.0 m/s.
If she accelerates at a constant rate of 2.0 m/s²; find her
velocity 7.0 s later.
From the Movie Classic, Slap Shot

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