Physics 1 Midterm Exam Review 2

5. Record the effort force shown on the Newton Scale in newtons while pulling the cart up the inclined plane.

15) A cart starts from rest and accelerates at 4.0 m/s2 for 5.0 s, then maintain that velocity for 10 s, and then decelerates at the rate of 2.0 m/s2 for 4.0 s. What is the final speed of the car?

An unknown force pushes a 17 kilogram block across a smooth (frictionless) floor. Three seconds

43. A stone is shown at rest on the ground. A. the vector shows the weight of the stone. complete the vector diagram showing another vector that results in zero net force on the stone. B. what is the conventional name of the vector you have drawn?

block is moving with a speed of 6 meters per second. What is the magnitude of the unknown force?

2. The blue and green vectors move in opposite directions as the red ball slows down.

After doing this problem, I found that I am very comfortable using the kinematic equation of vf = v​i​​+at, when I use this equation I find that I always get the right answer for the problem, which is great, and I have no further questions to help me understand this

3. Explain whether, during a trip, a car’s instantaneous speed (movement of an object at a specific instant) can ever be greater than its average speed.

A net force of 5.0 N moves a 2.0-kg object a distance of 3.0 m in 3.0 s. How much work is done on the object?

1. A 1.08 x 103 kg car uniformly accelerates for 12.0s from rest. During this time the car travels 132 m north. What is the net force acting on the car during this acceleration 2. A net force of 12 N is exerted on and to cause it to accelerate at a rate of 0.03 m/s2. Determine the mass of the encyclopedia. HYPERLINK http//fc.codmanacademy.org/branches/physicsofdriving2/pushingbuses.jpg INCLUDEPICTURE http//fc.codmanacademy.org/branches/physicsofdriving2/images/pagemaster/pushingbuses.jpg MERGEFORMATINET 5. 4. How much force does a 40,000kg rocket develop toaccelerate 2m/s2 5. Block 1 is 12kg and block 2 is 23kg calculate

6. After knowing A=B maybe the force is equal from the bug and the windshield. That’s the case with Newton’s third law

(1.5 pts) Find Distance to Accelerate and Stop with a Single Engine Failure at V1 (ft).

The average distance was 1.27 meters (Data Table 1).The marble was also launched at an angle of 25 degrees and a height of 1.05 meters. The average distance was 1.46 meters (Data Table 2). The marble took .452 seconds to hit the ground (Figure 1). The marble had an average velocity of 2.82 m/s (Figure 2). A triangle was drawn with a magnitude of 2.82 m/s. The x and y components of the triangle were calculated.

In total the firefighter has two different forces that are acting upon it that are affecting his acceleration. His first force is his weight and the second force is the friction force of the poll. Newton’s first law states “Every object continues in a state of rest or of uniform speed in a straight line unless acted on by a nonzero force” (Hewitt, 52). In this problem the downwards force in a straight line is the fireman’s weight. The force of the friction is going to be equal to the accelerating force of gravity, zero net force.

Based on the information you have found, what is the velocity of the wind relative to the ground? (Hint: what does equation 1 tell you?) _______