General Physics for Engineering I Exam

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Questions and Answers

Which of these options are correct? (Select all that apply)

Option 1
Option 2 (correct)
Option 4
Option 3 (correct)

This is an example statement that is true

False (B)

Example question?

example answer

The ______ barked

dog Signup and view all the answers

Match the following programming languages with their primary usage:

Python = General-purpose programming JavaScript = Client-side scripting for web applications SQL = Database queries CSS = Styling web pages Signup and view all the answers

A box is sliding down an incline tilted at an angle 14.0° above horizontal. The box is sliding down the incline at a speed of 1.70 m/s. The coefficient of kinetic friction between the box and the incline is 0.380. How far does the box slide down the incline before coming to rest?

1.16 m (D) Signup and view all the answers

A light weight object and a heavy object are sliding with equal speeds along a level frictionless surface. They both slide up the same frictionless hill. Which rises to a greater height? Ignore air resistance.

They both slide up to the same height. (D) Signup and view all the answers

An inelastic collision of two objects is characterized by the following?

Only A and B are true (E) Signup and view all the answers

A 0.140-kg baseball is dropped and reaches a speed of 1.20 m/s just before it hits the ground. It rebounces with a speed of 1.00 m/s. What is the change of the ball's momentum?

0.308 kg-m/s downwards (A) Signup and view all the answers

The rotating systems shown in Fig.1 differs only in that the two identical movable masses are positioned a distance r from the axis of rotation (left), or a distance r/2 from the axis of rotation (right). If you release the hanging blocks simultaneously from rest?

the block at left lands first (B) Signup and view all the answers

A uniform solid sphere of mass M and radius R rotates with an angular speed $\omega$ and a uniform solid cylinder of mass M, radius R, and height 2R. Both have the same rotational kinetic energy. What must be the angular speed of the cylinder?

$\sqrt{2}$/5$\omega$ (D) Signup and view all the answers

A skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25 kg.m² . If the arms are pulled in so the moment of inertia decreases to 1.80 kg.m², what is the final angular speed?

1.76 rad/s (B) Signup and view all the answers

What is the angular momentum about the origin of a particle with a mass of 500 g when it is located at r = (4î + 3ĵ - 2k) m and moving at v = (5i - 2j + 4k) m/s?

(4i - 13j -11.5k) kg.m²/s (D) Signup and view all the answers

A 1000-kg car approaches an intersection traveling north at 20.0 m/s. A 1200-kg car approaches the same intersection traveling east at 22.0 m/s. The two cars collide at the intersection and lock together. Ignoring any external forces that act on the cars during the collision, what is the velocity of the cars immediately after the collision?

21.1 m/s in a direction 47.7° east of north (D) Signup and view all the answers

A wheel rotates through an angle of 320° as it slows down from 78.0 rpm to 22.8 rpm. What is the magnitude of the average angular acceleration of the wheel?

8.35 rad/s² (B) Signup and view all the answers

A 6.00-kg block starts from rest and slides down a frictionless incline. When the block has slid a distance 2.00 m, its speed is 3.00 m/s. At what angle above the horizontal is the inclined plane tilted?

8.80° (E) Signup and view all the answers

Mass of 3.0 kg is subject to a force F(x) = 8.0 N - (4.0 N/m)x. The potential energy of the mass is zero at x = 0. What is the potential energy of the mass at x = 2.0 m?

-4.0 J (A) Signup and view all the answers

A 60.0-kg person rides in an elevator while standing on a scale. The scale reads 400 N. What is the acceleration of the elevator?

3.14 m/s² downward (A) Signup and view all the answers

A car enters a 300-m radius flat curve on a rainy day when the coefficient of static friction between its tires and the road is 0.600. What is the maximum speed which the car can travel around the curve without sliding?

29.6 m/s (A) Signup and view all the answers

Action-reaction forces are

equal in magnitude but point in opposite directions (B) Signup and view all the answers

What is the average speed of the object between time t = 0.0 s and time t = 9.0 s?

0.33 m/s (E) Signup and view all the answers

A speeding car is traveling at a constant 30.0 m/s when it passes a stationary police car. If the police car delays its motion for 1.00 s before starting, what must the constant acceleration of the police car be to catch the speeding car after the police car travels a distance of 300 m?

1.41 m/s² (E) Signup and view all the answers

A 10-g bullet moving 1000 m/s strikes and passes through a 2-kg block initially at rest, as shown. The bullet emerges from the block with a speed of 400 m/s. To what maximum height will the block rise above its initial position?

Option 2 (A), Option 3 (D) Signup and view all the answers

The pulley in the figure below has radius 0.160 m and moment of inertia 0.560 kg.m². The rope does not slip on the pulley rim. Use energy methods to calculate the speed of the 4.00-kg block just before it strikes the floor.

Option 2 (A), Option 3 (C) Signup and view all the answers

Flashcards

Static Friction on an Incline

The force of static friction must be equal to the component of gravity acting parallel to the incline to keep the block at rest.

Work Done by Gravity on Horizontal Motion

The work done by gravity on a mass moved horizontally is zero because the force of gravity is perpendicular to the direction of motion.

Potential Energy of a Spring

Potential energy is the energy stored by an object by virtue of its position relative to a reference point. For conservative forces, like the force due to a spring, the potential energy at a point is the negative of the work done by the force to move an object from the reference point to that point.

Power

Power is the rate at which energy is transferred or transformed. It is calculated as the work done divided by the time taken to do that work.