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Phys161 HW3 2D Kinematics

Course

General Physics I (PH 161)

63 Documents

Students shared 63 documents in this course

University

Montgomery College

Academic year: 2018/2019

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HW3 - 2D Kinematics

Due never

1 pt A car starts from rest and travels for 5 a

uniform acceleration of +1/s 2. The driver then applies

the brakes, causing a uniform acceleration of -2/s 2. If

the brakes are applied for 3, how fast is the car going at

the end of the braking period?

(inm/s)

1. A© 4. 61 × 10 − 1 B© 5. 39 × 10 − 1 C© 6. 31 × 10 − 1

D© 7. 38 × 10 − 1 E© 8. 64 × 10 − 1

1 pt How far has the car gone?

(inm)

2. A© 3. 14 × 101 B© 3. 55 × 101 C© 4. 01 × 101

D© 4. 54 × 101 E© 5. 12 × 101

1 pt

A soccer ball is kicked with a speed of 9 m/s at an angle

of 23◦above the horizontal. If the ball lands at the same

level from which it was kicked, how long was it in the air?

(ins)

3. A© 2. 37 × 10 − 1 B© 3. 15 × 10 − 1 C© 4. 20 × 10 − 1

D© 5. 58 × 10 − 1 E© 7. 42 × 10 − 1

1 pt A ball is thrown from a point 1 m above the ground.

The initial velocity is 18 m/s at an angle of 27◦above the

horizontal. Find the maximum height of the ball above the

ground.

(inm)

4. A©1 B©2 C©2 D©3.

E©4.

1 pt Calculate the speed of the ball at the highest point in

the trajectory.

(inm/s)

5. A©6 B©8 C© 1. 06 × 101

D© 1. 33 × 101 E© 1. 66 × 101

1 pt

Playing shortstop, you pick up a ground ball and throw it to

second base. The ball is thrown horizontally, with a speed

of 21 m/s, directly toward point A, as shown in the figure

below.

A B

When the ball reaches the second baseman 0 s later, it is

caught at point B. How far were you from the second base-

man?

(inm)

6. A©5 B©7 C© 1. 06 × 101

D© 1. 53 × 101 E© 2. 22 × 101

1 pt What is the distance of vertical drop, AB?

(inm)

7. A© 6. 01 × 10 − 1 B© 7. 51 × 10 − 1 C© 9. 38 × 10 − 1

D©1 E©1.

HW3 - 2D Kinematics

1 pt The pictures show cannonballs of two different masses

projected upward and forward. The cannonballs are projec-

ted at various angles above the horizontal, but all are projec-

ted with the same horizontal component of velocity.

Which of the following statements are true about the situ-

ations depicted in the figures above?

⊲The acceleration of the ball in flight is greater in E and F

than it is in A and B

8. A©True B©False

⊲The flight of the ball is identical in pictures A and B, inde-

pendent of the fact that the masses are different

9. A©True B©False

⊲The longest horizontal distance traveled is in pictures E and

F

10 .A©True B©False

⊲The highest vertical height reached is in pictures C and D

11 .A©True B©False

⊲At the top, the horizontal velocity of the cannonball is the

same in all cases

12 .A©True B©False

1 pt

In a friendly game of handball, you hit the ball essentially at

ground level and send it toward the wall with a speed of 11.

m/s at an angle of 22◦above the horizontal. How long does

it take for the ball to reach the wall if it is 4 m away?

(ins)

13. A© 1. 93 × 10 − 1 B© 2. 42 × 10 − 1 C© 3. 02 × 10 − 1

D© 3. 78 × 10 − 1 E© 4. 72 × 10 − 1

1 pt How high is the ball when it hits the wall?

(inm)

14. A© 9. 99 × 10 − 1 B©1 C©1.

D©2 E©3.

1 pt

A golf ball is struck with a five iron on level ground. It lands

88 m away 4 s later. What was the direction of the ball?

Give the angle counterclockwise relative to the horizontal.

(indeg)

15. A© 1. 34 × 101 B© 1. 78 × 101 C© 2. 36 × 101

D© 3. 14 × 101 E© 4. 18 × 101

1 pt What was the magnitude of the initial velocity?

(inm/s)

16. A© 2. 04 × 101 B© 2. 95 × 101 C© 4. 28 × 101

D© 6. 21 × 101 E© 9. 00 × 101

1 pt A rescue plane wants to drop supplies to isolated moun-

tain climbers on a rocky ridge H = 227 m below. If the plane

is traveling horizontally with a speed of 217 km/hr (60 m/s),

how far in advance of the recipients (horizontal distance) must

the goods be dropped?

(inm)

17. A© 131 B© 174 C© 232 D© 308

E©410.

HW3 - 2D Kinematics

1 pt The pictures show cannonballs of two different masses

projected upward and forward. The cannonballs are projec-

ted at various angles above the horizontal, but all are projec-

ted with the same vertical component of velocity.

Which of the following statements are true about the situ-

ations depicted in the figures above?

⊲The time in the air is the same in all cases

29 .A©True B©False

⊲The longest horizontal distance traveled is the same in all

cases

30 .A©True B©False

⊲The highest vertical height reached is in pictures B and E

31 .A©True B©False

⊲At the top, the vertical velocity of the cannonball is zero

32 .A©True B©False

⊲The flight of the ball is identical in pictures A and D, inde-

pendent of the fact that the masses are different

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Phys161 HW3 2D Kinematics

Course: General Physics I (PH 161)

63 Documents

Students shared 63 documents in this course

University: Montgomery College

Was this document helpful?

Raluca Teodorescu - Montgomery College Phys 1 1

HW3 - 2D Kinematics

Due never

1 pt A car starts from rest and travels for 5.17 swith a

uniform acceleration of +1.40 m/s2. The driver then applies

the brakes, causing a uniform acceleration of -2.03 m/s2. If

the brakes are applied for 3.14 s, how fast is the car going at

the end of the braking period?

(in m/s)

1. A4.61 ×10−1B5.39 ×10−1C6.31 ×10−1

D7.38 ×10−1E8.64 ×10−1

1 pt How far has the car gone?

(in m)

2. A3.14 ×101B3.55 ×101C4.01 ×101

D4.54 ×101E5.12 ×101

1 pt

A soccer ball is kicked with a speed of 9.13 m/s at an angle

of 23.5◦above the horizontal. If the ball lands at the same

level from which it was kicked, how long was it in the air?

(in s)

3. A2.37 ×10−1B3.15 ×10−1C4.20 ×10−1

D5.58 ×10−1E7.42 ×10−1

1 pt A ball is thrown from a point 1.29 m above the ground.

The initial velocity is 18.6 m/s at an angle of 27.0◦above the

horizontal. Find the maximum height of the ball above the

ground.

(in m)

4. A1.57 B2.09 C2.79 D3.71

E4.93

1 pt Calculate the speed of the ball at the highest point in

the trajectory.

(in m/s)

5. A6.79 B8.49 C1.06 ×101

D1.33 ×101E1.66 ×101

1 pt

Playing shortstop, you pick up a ground ball and throw it to

second base. The ball is thrown horizontally, with a speed

of 21.6 m/s, directly toward point A, as shown in the figure

below.

When the ball reaches the second baseman 0.489 s later, it is

caught at point B. How far were you from the second base-

man?

(in m)

6. A5.02 B7.28 C1.06 ×101

D1.53 ×101E2.22 ×101

1 pt What is the distance of vertical drop, AB?

(in m)

7. A6.01 ×10−1B7.51 ×10−1C9.38 ×10−1

D1.17 E1.47

Phys161 HW3 2D Kinematics

General Physics I (PH 161)

Montgomery College

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Preview text

HW3 - 2D Kinematics

Due never

1 pt A car starts from rest and travels for 5 a

uniform acceleration of +1/s 2. The driver then applies

the brakes, causing a uniform acceleration of -2/s 2. If

the brakes are applied for 3, how fast is the car going at

the end of the braking period?

(inm/s)

1. A© 4. 61 × 10 − 1 B© 5. 39 × 10 − 1 C© 6. 31 × 10 − 1

D© 7. 38 × 10 − 1 E© 8. 64 × 10 − 1

1 pt How far has the car gone?

(inm)

2. A© 3. 14 × 101 B© 3. 55 × 101 C© 4. 01 × 101

D© 4. 54 × 101 E© 5. 12 × 101

1 pt

A soccer ball is kicked with a speed of 9 m/s at an angle

of 23◦above the horizontal. If the ball lands at the same

level from which it was kicked, how long was it in the air?

(ins)

3. A© 2. 37 × 10 − 1 B© 3. 15 × 10 − 1 C© 4. 20 × 10 − 1

D© 5. 58 × 10 − 1 E© 7. 42 × 10 − 1

1 pt A ball is thrown from a point 1 m above the ground.

The initial velocity is 18 m/s at an angle of 27◦above the

horizontal. Find the maximum height of the ball above the

ground.

(inm)

4. A©1 B©2 C©2 D©3.

E©4.

1 pt Calculate the speed of the ball at the highest point in

the trajectory.

(inm/s)

5. A©6 B©8 C© 1. 06 × 101

D© 1. 33 × 101 E© 1. 66 × 101

1 pt

Playing shortstop, you pick up a ground ball and throw it to

second base. The ball is thrown horizontally, with a speed

of 21 m/s, directly toward point A, as shown in the figure

below.

When the ball reaches the second baseman 0 s later, it is

caught at point B. How far were you from the second base-

man?

(inm)

6. A©5 B©7 C© 1. 06 × 101

D© 1. 53 × 101 E© 2. 22 × 101

1 pt What is the distance of vertical drop, AB?

(inm)

7. A© 6. 01 × 10 − 1 B© 7. 51 × 10 − 1 C© 9. 38 × 10 − 1

D©1 E©1.

HW3 - 2D Kinematics

1 pt The pictures show cannonballs of two different masses

projected upward and forward. The cannonballs are projec-

ted at various angles above the horizontal, but all are projec-

ted with the same horizontal component of velocity.

Which of the following statements are true about the situ-

ations depicted in the figures above?

⊲The acceleration of the ball in flight is greater in E and F

than it is in A and B

8. A©True B©False

⊲The flight of the ball is identical in pictures A and B, inde-

pendent of the fact that the masses are different

9. A©True B©False

⊲The longest horizontal distance traveled is in pictures E and

F

10 .A©True B©False

⊲The highest vertical height reached is in pictures C and D

11 .A©True B©False

⊲At the top, the horizontal velocity of the cannonball is the

same in all cases

12 .A©True B©False

1 pt

In a friendly game of handball, you hit the ball essentially at

ground level and send it toward the wall with a speed of 11.