ENGINEERING MECHANICS EXAM QUESTIONS WITH ANSWERS 2025
PROBLEM 1.1
For the 4000 lb car, determine
1. its mass in slugs.
a. 124.22 slug c. 407.75 slug
b. 104.22 slug d. 307.75 slug
2. its weight in newtons.
a. 17,800 N c. 15,800 N
b. 16,800 N d. 14,800 N
3. its mass in kilograms.
a. 1814.37 kg c. 1610.60 kg
b. 1712.54 kg d. 1508.66 kg
PROBLEM 1.2
4. Consider two iron spheres, each of diameter 200 mm, which are just touching.
At what distance r from the center of the earth will the force of mutual
attraction between the contacting spheres be equal to the force exerted by the
earth on one of the spheres? The density of iron is 7,874 kg/m3.
a. 75.12 ⨯106 km c. 55.12 ⨯106 km
b. 65.12 ⨯106 km d. 85.12 ⨯106 km
PROBLEM 1.3
A person weighs 40N on the moon, where g = 1.6 m/s2. Determine
5. the mass of the person.
a. 25 kg c. 4.08 kg
b. 30 kg d. 5.08 kg
6. the weight of the person on earth.
a. 245.25 N c. 40 N
b. 294.3 N d. 49.83 N
PROBLEM 1.4
7. The radius and length of a steel cylinder are 80 mm and 120 mm, respectively.
If the mass density of steel is 7850 kg/m3, determine the weight of the cylinder.
a. 185.80 N c. 165.80 N
b. 175.80 N d. 155.80 N
PROBLEM 1.5
Convert the following:
8. 200 KN/m2 to lb/in2.
a. 27.01 c. 26.01
b. 28.01 d. 29.01
9. 40 m/s to km/h.
a. 124 c. 134
b. 144 d. 154
10. 600 slugs to Mg.
a. 6.76 c. 9.76
b. 8.76 d. 5.76
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, ENGINEERING MECHANICS EXAM QUESTIONS WITH ANSWERS 2025
11. 30 lb/ft2 to N/m2.
a. 1436.16 c. 1436.16
b. 1436.16 d. 1436.16
PROBLEM 1.6
12. Find the mass of an object (in kg) that weighs 2 KN at a height of 2000 km
above the earth’s surface. The mass and radius of earth are 5.9742 × 1024 kg
and 6400 km respectively.
a. 334 kg c. 354 kg
b. 344 kg d. 364 kg
PROBLEM 1.7
13. The weight of an object on earth is M. Which of the following nearly gives the
mass of the object on the moon?
Radius of earth = 6400 km
Mass of moon = 0.073483 × 1024 kg
Radius of moon = 1740 km
a. M/4 c. M/6
b. M/3 d. M/9
PROBLEM 1.8
14. A man weighs 200N on the surface of the earth. Find his weight at an elevation
equal to the radius of the earth. The mass and radius of earth are 5.9742 × 1024
kg and 6400 km respectively.
a. 59.61 N c. 69.61 N
b. 49.61 N d. 79.61 N
PROBLEM 1.9
15. A spacecraft travels along the straight line connecting the earth and the sun. At
what distance from earth will the gravitational forces of the earth and the sun
be equal?
Mass of earth = 5.9742 × 1024 kg
Radius of earth = 6378 km
Mass of sun = 1.9891 × 1030 kg
Distance between earth and sun = 149.6 × 106 km
a. 0.249 × 106 km c. 0.269 × 106 km
b. 0.259 × 106 km d. 0.279 × 106 km
PROBLEM 2.1
1. A car is traveling due west at 20.0 m/s. Find the velocity of the car after 3.00 s if
its acceleration is 1.0 m/s2 due west. Assume that the acceleration remains
constant.
a. 17.0 m/s west c. 17.0 m/s east
b. 23.0 m/s west d. 23.0 m/s east
PROBLEM 2.2
2. A car is traveling due west at 20.0 m/s. Find the velocity of the car after 37.00 s
if its acceleration is 1.0 m/s2 due east. Assume that the acceleration remains
constant.
2
, a. 17.0 m/s west c. 17.0 m/s east
b. 23.0 m/s west d. 23.0 m/s east
PROBLEM 2.3
3. An electron, starting from rest and moving with a constant acceleration, travels
2.0 cm in 2.0 s. What is the magnitude of this acceleration?
a. 20 mm/s2 c. 15 mm/s2
b. 10 mm/s2 d. 5.0 mm/s2
PROBLEM 2.4
4. A car travels at 24.0 m/s north for 40.0 min and then shift east and travels at
30.0 m/s for 20.0 min. What is the car’s total displacement?
a. 2.56 x 104 m c. 6.48 x 104 m
b. 6.96 x 104 m d. 6.79 x 104 m
PROBLEM 2.5
5. A car moving at 80 km/h comes to a stop in 6.0 s. What was its average
deceleration?
a. 2.40 m/s2 c. 1.45 m/s2
b. 4.21 m/s2 d. 3.70 m/s2
PROBLEM 2.6
6. A car travels at 24.0 mph for 18.0 min and at 38.0 mph for 25.0 min. How far
does it travel overall?
a. 2.45 ⨯ 104 m c. 3.70 ⨯ 104 m
b. 13.83 ⨯ 103 m d. 10.30 x⨯104 m
PROBLEM 2.7
7. A train running at 80 kph decelerates at 3 m/min 2 for 18 minutes. Find the
distance travelled within this period.
a. 16.14 km c. 18.14 km
b. 17.14 km d. 19.14 km
PROBLEM 2.8
8. A man driving his car at 60 mph suddenly sees an object in the road 80 feet
ahead. What constant deceleration is required to stop the car in this distance?
a. 38.4 ft/s2 c. 58.4 ft/s2
b. 48.4 ft/s 2 d. 68.4 ft/s2
PROBLEM 2.9
9. A stone was dropped freely from a balloon at a height of 250 m. above the
ground. The balloon is moving upward at a speed of 40 m/s. Determine the
velocity of the stone as it hits the ground.
a. 80.65 m/s c. 60.65 m/s
b. 70.65 m/s d. 50.65 m/s
PROBLEM 2.10
A stone is thrown vertically upward at a speed of 50 m/s from the top of a tower
300 m.
10. Determine the velocity of the stone when it strikes the ground.
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PROBLEM 1.1
For the 4000 lb car, determine
1. its mass in slugs.
a. 124.22 slug c. 407.75 slug
b. 104.22 slug d. 307.75 slug
2. its weight in newtons.
a. 17,800 N c. 15,800 N
b. 16,800 N d. 14,800 N
3. its mass in kilograms.
a. 1814.37 kg c. 1610.60 kg
b. 1712.54 kg d. 1508.66 kg
PROBLEM 1.2
4. Consider two iron spheres, each of diameter 200 mm, which are just touching.
At what distance r from the center of the earth will the force of mutual
attraction between the contacting spheres be equal to the force exerted by the
earth on one of the spheres? The density of iron is 7,874 kg/m3.
a. 75.12 ⨯106 km c. 55.12 ⨯106 km
b. 65.12 ⨯106 km d. 85.12 ⨯106 km
PROBLEM 1.3
A person weighs 40N on the moon, where g = 1.6 m/s2. Determine
5. the mass of the person.
a. 25 kg c. 4.08 kg
b. 30 kg d. 5.08 kg
6. the weight of the person on earth.
a. 245.25 N c. 40 N
b. 294.3 N d. 49.83 N
PROBLEM 1.4
7. The radius and length of a steel cylinder are 80 mm and 120 mm, respectively.
If the mass density of steel is 7850 kg/m3, determine the weight of the cylinder.
a. 185.80 N c. 165.80 N
b. 175.80 N d. 155.80 N
PROBLEM 1.5
Convert the following:
8. 200 KN/m2 to lb/in2.
a. 27.01 c. 26.01
b. 28.01 d. 29.01
9. 40 m/s to km/h.
a. 124 c. 134
b. 144 d. 154
10. 600 slugs to Mg.
a. 6.76 c. 9.76
b. 8.76 d. 5.76
1
, ENGINEERING MECHANICS EXAM QUESTIONS WITH ANSWERS 2025
11. 30 lb/ft2 to N/m2.
a. 1436.16 c. 1436.16
b. 1436.16 d. 1436.16
PROBLEM 1.6
12. Find the mass of an object (in kg) that weighs 2 KN at a height of 2000 km
above the earth’s surface. The mass and radius of earth are 5.9742 × 1024 kg
and 6400 km respectively.
a. 334 kg c. 354 kg
b. 344 kg d. 364 kg
PROBLEM 1.7
13. The weight of an object on earth is M. Which of the following nearly gives the
mass of the object on the moon?
Radius of earth = 6400 km
Mass of moon = 0.073483 × 1024 kg
Radius of moon = 1740 km
a. M/4 c. M/6
b. M/3 d. M/9
PROBLEM 1.8
14. A man weighs 200N on the surface of the earth. Find his weight at an elevation
equal to the radius of the earth. The mass and radius of earth are 5.9742 × 1024
kg and 6400 km respectively.
a. 59.61 N c. 69.61 N
b. 49.61 N d. 79.61 N
PROBLEM 1.9
15. A spacecraft travels along the straight line connecting the earth and the sun. At
what distance from earth will the gravitational forces of the earth and the sun
be equal?
Mass of earth = 5.9742 × 1024 kg
Radius of earth = 6378 km
Mass of sun = 1.9891 × 1030 kg
Distance between earth and sun = 149.6 × 106 km
a. 0.249 × 106 km c. 0.269 × 106 km
b. 0.259 × 106 km d. 0.279 × 106 km
PROBLEM 2.1
1. A car is traveling due west at 20.0 m/s. Find the velocity of the car after 3.00 s if
its acceleration is 1.0 m/s2 due west. Assume that the acceleration remains
constant.
a. 17.0 m/s west c. 17.0 m/s east
b. 23.0 m/s west d. 23.0 m/s east
PROBLEM 2.2
2. A car is traveling due west at 20.0 m/s. Find the velocity of the car after 37.00 s
if its acceleration is 1.0 m/s2 due east. Assume that the acceleration remains
constant.
2
, a. 17.0 m/s west c. 17.0 m/s east
b. 23.0 m/s west d. 23.0 m/s east
PROBLEM 2.3
3. An electron, starting from rest and moving with a constant acceleration, travels
2.0 cm in 2.0 s. What is the magnitude of this acceleration?
a. 20 mm/s2 c. 15 mm/s2
b. 10 mm/s2 d. 5.0 mm/s2
PROBLEM 2.4
4. A car travels at 24.0 m/s north for 40.0 min and then shift east and travels at
30.0 m/s for 20.0 min. What is the car’s total displacement?
a. 2.56 x 104 m c. 6.48 x 104 m
b. 6.96 x 104 m d. 6.79 x 104 m
PROBLEM 2.5
5. A car moving at 80 km/h comes to a stop in 6.0 s. What was its average
deceleration?
a. 2.40 m/s2 c. 1.45 m/s2
b. 4.21 m/s2 d. 3.70 m/s2
PROBLEM 2.6
6. A car travels at 24.0 mph for 18.0 min and at 38.0 mph for 25.0 min. How far
does it travel overall?
a. 2.45 ⨯ 104 m c. 3.70 ⨯ 104 m
b. 13.83 ⨯ 103 m d. 10.30 x⨯104 m
PROBLEM 2.7
7. A train running at 80 kph decelerates at 3 m/min 2 for 18 minutes. Find the
distance travelled within this period.
a. 16.14 km c. 18.14 km
b. 17.14 km d. 19.14 km
PROBLEM 2.8
8. A man driving his car at 60 mph suddenly sees an object in the road 80 feet
ahead. What constant deceleration is required to stop the car in this distance?
a. 38.4 ft/s2 c. 58.4 ft/s2
b. 48.4 ft/s 2 d. 68.4 ft/s2
PROBLEM 2.9
9. A stone was dropped freely from a balloon at a height of 250 m. above the
ground. The balloon is moving upward at a speed of 40 m/s. Determine the
velocity of the stone as it hits the ground.
a. 80.65 m/s c. 60.65 m/s
b. 70.65 m/s d. 50.65 m/s
PROBLEM 2.10
A stone is thrown vertically upward at a speed of 50 m/s from the top of a tower
300 m.
10. Determine the velocity of the stone when it strikes the ground.
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