Lola's car is stuck in the mud. Julie and Jamaal come along in a truck to help pull her out. They attach one end of a tow strap to the front of the car and the other end to the truck's trailer hitch, and the truck starts to pull. Meanwhile, Julie and Jamaal get behind the car and push. The truck generates a horizontal force of 387 lb on the car. Julie and Jamaal are pushing at a slight upward angle and generate a force of 122 lb on the car. These forces can be represented by vectors, as shown in the figure below. The angle between these vectors is 21.4°. Find the resultant force (the vector sum), then give its magnitude and its direction angle from the positive x-axis. 122 lb 21.4° 387 lb Q a. The resultant force is (Tip: omit degree notations from your answers; e.g. enter cos(45) instead of cos(45°)) b. It's magnitude is lb. c. It's angle from the positive x-axis is

In the back of the truck is a 200kg box that has a coefficient of static friction of 0.8 and a coefficient of kinetic friction of 0.4 between the truck and the box. You are driving on the freeway at 25m/s. There is a car ahead of you that is driving at 30m/s. Your front bumper is 30m behind the back of the first car. You would like to pass the other car and pull back into the same lane when your back bumper is 10m ahead of the front bumper of the first car in 5 seconds. The length of the car ahead of you is 3m and the length of your car is 4m.a) What minimum acceleration do you need to do this?b) What distance does your car travel in that time?c) Does the box in your truck start to slide off the truck?

A woman pushes a 10.0 kg box across a horizontal floor with a constant force of magnitude 40.0 N directed at an angle of -25° with respect to the positive x-axis. The box moves horizontally to the right. At the origin (x=0) the box has an initial speed of 4.00 m/s and the woman pushes it to a location ofx=3.00 m. what is the force of the woman? what is the force of gravity? what is the normal force of the floor?

A 1500-N crate is to be held in place on a ramp that rises at 30.0° above the horizontal (see figure). The massless rope attached to the crate makes a 22.0° angle above the surface of the ramp. The coefficients of friction between the crate and the surface of the ramp are uk = 0.450 and us = 0.650. The pulley has no appreciable mass or friction. What is the MAXIMUM weight w that can be used to hold this crate stationary on the ramp? %3D W= ? Crate 22.0° Ramp 30.00

Physics The lock down has made mellisa soft. She gets caught the last time she tries to steal a box of red vines, so mallisa decides she needs to start working out. Since gyms are so expensive, mallisa decides to practice pushing a 100 kg box filled with chemistry textbooks place of red vines) across her living room and back, a distance of 30 m. If mellisa pushes with a force of 875 N at an angle 25 degrees below the horizontal, what was the amount of work that mellisa performed on the box? a)-23.800J b) -13,600J c)31,200J d) 23,800J

A 10 m long board that has a mass of 20 kg is held up by two vertical ropes. The left rope is 2 m from the left end of the board, and the other rope is 2 m from the right end of the board. A 40 kg box sits 2 m from the right end. Find the tension in the rope on the left.

Joe, a carpenter with a weight of 600 N, is working on a scaffold. His young son Jack is helping him. Jack has a weight of 450 N.   The scaffold is held up by two ropes. One rope has an upward tension of 750 N. The weight of the scaffold is 400 N. What is the upward tension in the other rope?   Which below is correct? 700 N 850 N 1000 N 750 N

An antelope is being pulled by two forces whose vector-component expressions are: F1 = 3.6Ni + -8.9Nj + -3.7Nk F2 = 8.2Ni + -1.7Nj + 2.4Nk What is the angle (in degrees) between these two vectors?

Alice and Bob had car trouble. Their car broke down and Bob could not restart it. Alice got out to push the car and after some time she asked Bob if he would trade jobs with her for a while. Bob answered, "It won't matter if I do. I took physics, and I know that no matter how hard I push on the car, it will push back on me just as hard so I won't accomplish anything. That's Newton's Third Law and it is always true. It has been tested millions of times. It wouldn't matter if I pushed the car. I wouldn't be able to push it anywhere." Aside from the fact that his relationship with Alice is probably fınished, which of the following correctly explains a flaw in Bob's logic? The third law says that the two forces he is talking about are only approximately equal. The third law does not apply in this case because the car is on wheels. O The two forces he is talking about are on two different objects. Thw two forces will not be the same because the two masses are different. The third law only…