7. Which of the following is the condition for the three-force theorem in mechanics? a. The force system should be in equilibrium only b. The force systems should be non-coplanar c. The system should be co-planar, parallel d. The force system should be in equilibrium, co-planar, concurrent, or parallel 8. Which of the following is the SI unit of force? a. Kg m b. Kg m2 c. Kg m2 /s d. Kg m/s2

the weight ww is 60.9 N. What is the tension in the diagonal string? Find the magnitudes of the horizontal forces F→1 and F→2 that must be applied to hold the system in the position shown.

36 PM Tue Sep 24 Course Home XC Suppose The Po X G The total mass o X hat X openvellum.ecollege.com eek 4 Homework oblem 9.34 4 of 4 The total mass of the arm shown in is 2.5 kg FM 150 mg 12 cm 24 em Part A Determine the force, required of the "deltoid" muscle to hold up arm Express your answer to two significant figures and include the appropriate units. ? μΑ Value Units FM Request Answer Submit Part B PPearson Copyright O 2019 Pearson Education Inc. All rights reserved. Terms of Use Privacy Policy Permissions Contact Us

HW1.4. 2D Moment resultant Two forces lying in the x-y plane are defined by their magnitudes and direction angles, as shown in the figure below. Force F₁ has a magnitude F₁ = 360 N, an angle 0₁ = 109°, and acts at point A (310, 0) mm. Force F₂ has a magnitude F₂ = 270 N, an angle 02 = 56°, and acts at point B = (0,385) mm. Determine the total moment about point O due to these two forces. Remember to follow the standard sign convention for clockwise (-) and counter-clockwise (+) moments. y B 10 02 F₂ F₁ A 0₁ X TEGINGEN

In a loop-de-loop ride at the fair a 200 Newton child experience as a 100 Newton apparent weight at the top of the loop. The diameter of the ride is 12 m. a. How fast is the child traveling at the top of the ride? b. Neglecting friction how fast is the child traveling at the bottom of the ride. c. what is the child's parent wait at the bottom of the ride d. In the reference frame of the child are they accelerating? What role does a child's inertia force play?

On a roller coaster ride the total mass of a cart - with two passengers included - is 268 kg. Peak K is at 43.2 m above the ground and peak L is at 26.0 m. At location K the speed of the cart is 17.2 m/s, and at location L it is 12.5 m/s. (The wheel mechanism on roller coaster carts always keeps the carts safely on the rail.) K How much mechanical energy is lost due to friction between the two peaks? Submit Answer Tries 0/10

The Moon is 60 Earth radii (i.e. 60 rEarth) from the center of the Earth and has a mass of 0.012 Earth masses (i.e. 0.012 mEarth) a. How many Earth radii is the center of mass (the “barycenter”) of the Earth-Moon system from the center of the Earth? b. Is the center of mass inside the Earth or outside the Earth? c. What point along the line from the center of the Earth to the center of the Moon orbits the barycenter of the Solar System in a (nearly) circular orbit (e.g. the center of the Earth, the barycenter of the Earth-Moon system, the midpoint, the center of the Moon)?

3. A particle is acted upon by the following four forces: 21 N pulling east, 32 N pulling west, 52 N pulling north, and 42 N pulling south. a. Draw a diagram showing these four forces. b. Calculate the resultant and equilibrant of these forces. Content C3 Distinguish between the geometric representations of a single linear equation or a system of two linear equations in two- space and three- space, and determine different geometric configurations of lines and planes in three-space; Level

1. A 20,000 pound truck is parked on a 15° slope. Find the force required to keep the truck from rolling down the hill (that is, find the magnitude of the vector component of the weight of the truck that is parallel to the slope). 2.Determine the vector v with magnitude of 30 that makes an angle of 120° with the positive xaxis. State the vector in either ordered set or unit vector notation with components written as exact values (simplified radical form).

A mass in translational equilibrium experiences 3 forces. Select the case that most fully and accurately describes the scenario. I. The magnitudes of the 3 forces are equivalent. II. The angles between the 3 vectors are 120 degrees. III. The vector sum of the 3 forces equals 0N. IV. All 3 forces are parallel.   A. III only   B. I only   C. I and III only   D. IV only   E. II and III only