1.

Ram is out with his friends. The car breaks down and they find themselves getting

a workout. Together, they apply a total force of 1080 N to push the car 218 m to

the nearest fuel station. Determine the work done on the car.

A. 1.2 x 104

N

B. 3.5 x 103

kJ

C. 2.35 x 105 J

D 1.6 x 106 KN

ANSWER: C

2.

Tom is pulling on a rope to drag his backpack to school across the ice. He pulls

upwards and rightwards with a force of 22.9 N at an angle of 35 degrees above the

horizontal to drag his backpack a horizontal distance of 129 meters to the right.

Determine the work done upon the backpack.

A. 1.5 x 104 J

B. 4.5 x 103 kJ

C. 3.05 x 104 J

D. 2.42 x 103 J

ANSWER: D

3.

Lamar Gant, U.S. power lifting star became the first man to dead lift five times his

own body weight in 1985. Dead lifting involves raising a loaded barbell from the

floor to a position above the head with outstretched arms. Determine the work

done by Lamar in dead lifting 300 kg to a height of 0.90 m above the ground.

A. 2.6 x 103 J

B. 1.3 x 103 kJ

C. 5.0 x 103 J

D. 1.9 x 103 kJ

ANSWER: A

4.

Rani has just arrived at the airport and is dragging her suitcase to the luggage

check-in desk. She pulls on the strap with a force of 190 N at an angle of 35 to the

horizontal to displace it 45 m to the desk. Determine the work done by Rani on the

suitcase.

A. 3.0 x 103 J

B. 2.0 x 103 J

C. 7.0 x 103 J

D. 5.0 x 103 J

ANSWER: C

5.

During the Powerhouse lab, Amit runs up the stairs, elevating his 102 kg body a

vertical distance of 2.29 meters in a time of 1.32 seconds at a constant speed. The

power generated by Amit is:

A. 1.25 x 103 W

B. 2.5 x 103 kW

C. 1.73 x 103 W

D. 3.5 x 103 W

ANSWER: C

6.

The Taipei 101 in Taiwan is a 508 m tall, 101-story skyscraper. The skyscraper is

the home of the worlds fastest elevator. The elevators transport visitors from the

ground floor to the Observation Deck on the 89th floor at speeds up to 16.8 m/s.

determine the power delivered by the motor to lift the 10 passengers at this speed.

The combined mass of the passengers and cabin is 1250 kg.

A. 1.2 x 103 W

B. 1.45 x 104 W

C. 2.06 x 105 W

D. 3.5 x 106 W

ANSWER: C

7.

The first asteroid to be discovered is Ceres. It is the largest and most massive

asteroid is our solar systems asteroid belt, having an estimated mass of

3.0 x 1021

kg and an orbital speed of 17900 m/s. determine the amount of kinetic

energy possessed by Ceres.

A. 2.4 x 1020

J

B. 4.8 x 1029

J

C. 5.4 x 1025

J

D. 3.2 x 1021

J

ANSWER: B

8.

A 78-kg skydiver has a speed of 62 m/s at an altitude of 870 m above the ground.

The total mechanical energy possessed by the skydiver is:

A. 2.3 x 104 J

B. 8.1 x 105 J

C. 5.6 x 106 J

D. 2.6 x 103 J

ANSWER: B

9.

With a wheel base of 2a, height of CG above road level h, radius of curvature r and

weight W, the reaction on the inner wheels of a moving car on a circular road is

A. W/2[1 - (gra/vh)]

B. W/2[1 + (gra/vh)]

C. W/2[1 - (vh/gra)]

D. W/2[1 + (vh/gra)]

ANSWER C

10.

A vehicle has a wheel base =2a, the height of its CG above road level is h. If it

moves in a circular path, the limiting speed to avoid overturning is

A. (gra/h)

B. (gra/h)

C. (gra/h)

D. (gra/h) ^ (1/4)

ANSWER A

11.

For a projectile =30 degrees. If it is projected on a horizontal plane, the total time

of flight is

A. u2/2g

B. u2/g

C. u/2g

D. u/g

ANSWER D

12.

A projectile projected on a horizontal plane has u=1 m/s and =45 degrees. Its

horizontal range is,

A. 9.81 m

B. 1/9.81 m

C. 19.62 m

D. 1/19.62 m

ANSWER B

13.

A projectile projected on a horizontal plane has u=1m/s and =30. The maximum

height attained by it is

A. 1/8g

B. 1/4g

C. 1/2g

D. 1/g

ANSWER A