Physics - Mock Test 3

Question 21

An object is shot vertically upward. While it is rising

A) its velocity and acceleration are both upward B) its velocity is upward and its acceleration is downward C) its velocity and acceleration are both downward D) its velocity is downward and its acceleration is upward

---

No Details

Question 22

A freely falling body has a constant acceleration of 9.8 m/s². This means that

A) the body falls 9.8 m during each second B) the body falls 9.8 m during the first second only C) the speed of the body increases by 9.8 m/s during each second D) the acceleration of the body increases by 9.8 m/s² during each second

---

No Details

Question 23

Which one of the following statements is correct for an object released from rest

A) The average velocity during the first second of time is 4.9 m/s B) During each second the object falls 9.8 m C) The acceleration changes by 9.8 m/s² every second D) The object falls 9.8 m during the first second of time

---

No Details

Question 24

A baseball is thrown vertically into the air. The acceleration of the ball at its highest point is

A) zero B) g, down C) g, up D) 2g, down

---

No Details

Question 25

At a stop light, a truck traveling at 15 m/s passes a car as it starts from rest. The truck travels at constant velocity and the car accelerates at 3 m/s². How much time does the car take to catch up to the truck

A) 5 s B) 10 s C) 15 s D) 20 s

---

No Details

Question 26

A ball is in free fall. Upward is taken to be the positive direction. The displacement of the ball during a short time interval is

A) positive during both ascent and descent B) negative during both ascent and descent C) negative during ascent and positive during descent D) positive during ascent and negative during descent

---

No Details

Question 27

A ball is in free fall. Its acceleration is

A) downward during both ascent and descent B) downward during ascent and upward during descent C) upward during ascent and downward during descent D) upward during both ascent and descent

---

No Details

Question 28

A window washer attempts to lean a ladder against a friction less wall. He finds that the ladder slips on the ground when it is placed at an angle of less than 75â—¦ to the ground but remains in place when the angle is greater than 75â—¦. The coefficient of static friction between the ladder and the ground

A) is about 0.13 B) is about 0.27 C) is about 1.0 D) depends on the mass of the ladder

---

No Details

Question 29

A sphere with a radius of 1.7 cm has a surface area of

A) 2.1 × 10⁻⁵ m² B) 9.1 × 10⁻⁴ m² C) 3.6 × 10⁻³ m² D) 0.11 m²

---

No Details

Question 30

A sphere with a radius of 1.7 cm has a volume of

A) 2.1 × 10⁻⁵ m³ B) 9.1 × 10⁻⁴ m³ C) 3.6 × 10⁻³ m³ D) 0.11 m³

---

No Details