Question 1

A car moves along a straight road with a constant velocity of $$20\ \mathrm{m/s}$$ for $$10\ \mathrm{s}$$, then accelerates uniformly to $$40\ \mathrm{m/s}$$ over the next $$5\ \mathrm{s}. $$What is the total displacement of the car during the $$15\ \mathrm{s}$$ interval?

Accepted Answer

$$350\ \mathrm{m}$$

Question 2

Which of the following statements best describes a vector quantity?

Accepted Answer

A quantity that has both magnitude and direction.

Question 3

A ball is thrown vertically upward with an initial velocity of $$15\ \mathrm{m/s}. $$Neglecting air resistance, what is the velocity of the ball when it returns to its original position?

Accepted Answer

$$-15\ \mathrm{m/s}$$

Question 4

Which kinematic equation would you use to solve for displacement when initial velocity, acceleration, and time are known, but final velocity is not?

Accepted Answer

$$x = v_0$ t + \frac{1}{2} a t^2$

Question 5

On a position vs. time graph, what does the slope of the graph represent?

Accepted Answer

Velocity

Question 6

A runner accelerates from rest at $$2\ \mathrm{m/s^2$}$$ for $$5\ \mathrm{s}. $$What is the runner's final velocity?

Accepted Answer

$$10\ \mathrm{m/s}$$

Question 7

Which of the following is a scalar quantity?

Accepted Answer

Distance

Question 8

A cyclist travels $$100\ \mathrm{m}$$ north, then $$100\ \mathrm{m}$$ east. What is the magnitude of the cyclist's displacement?

Accepted Answer

$$141\ \mathrm{m}$$

Question 9

If a car's velocity changes from $$30\ \mathrm{m/s} to$$ $$10\ \mathrm{m/s} in$$ $$4\ \mathrm{s}$$, what is its average acceleration?

Accepted Answer

$$-5\ \mathrm{m/s^2$}$$

Question 10

Which of the following best describes the particle model in physics?

Accepted Answer

It simplifies an object as a single point, ignoring its size and internal motion.

Question 11

A rock is dropped from a cliff and falls freely under gravity. Which kinematic equation would you use to find the time it takes to hit the ground if the height is known?

Accepted Answer

$$y = v_0$ t + \frac{1}{2} g t^2$

Question 12

Which of the following is NOT a correct use of significant figures?

Accepted Answer

Reporting the answer with more significant figures than the input values.

Question 13

A car travels at $$25\ \mathrm{m/s}$$ for $$8\ \mathrm{s}$$, then slows down uniformly to $$5\ \mathrm{m/s} in$$ $$3\ \mathrm{s}. $$What is the car's acceleration during the slowing down phase?

Accepted Answer

$$-6.67\ \mathrm{m/s^2$}$$

Question 14

Which statement about acceleration is correct?

Accepted Answer

Acceleration can be in the opposite direction to velocity.

Question 15

A student converts $$120\ \mathrm{cm} to $$meters. What is the correct value in SI units?

Accepted Answer

$$1.20\ \mathrm{m}$$

Question 16

A position vs. time graph for a moving object is a straight line with a negative slope. What does this indicate about the object's motion?

Accepted Answer

The object is moving at a constant negative velocity.

Question 17

A ball is thrown downward with an initial velocity of $$5\ \mathrm{m/s}$$ from a height of $$20\ \mathrm{m}. $$What is its velocity just before hitting the ground? (Assume $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$20.0\ \mathrm{m/s}$$

Question 18

Which of the following is the correct SI unit for acceleration?

Accepted Answer

$$\mathrm{m/s^2$}$$

Question 19

A car starts from rest and accelerates at $$3\ \mathrm{m/s^2$}$$ for $$6\ \mathrm{s}. $$What is the total distance traveled?

Accepted Answer

$$54\ \mathrm{m}$$

Question 20

Which of the following best describes the difference between distance and displacement?

Accepted Answer

Distance is the total length traveled; displacement is the change in position.

Q1 Final Study Guide CH1-2

Guida di studio - Domande di pratica

Study guide - Flashcard