A force F = (20.0i + 18.0j + 24.0k) N acts on a small object of mass 95 kg. What will be the magnitude of the acceleration of the object? If the displacement vector dr = (10.0i + 8.0j) m, what is the work done by the force? The angle between F and dr

Consider an object of mass m = 4 kg on a frictionless table. The object experiences a repulsive force F = a/x2 + b/x, where F is in newtons and x is the position of the object relative to the origin. Write an expression for the work done by the repulsive force on the object as it moves from an initial position of x1 to a final position of x2.    If the object starts at a position of x1 = 8.5 m apart, how much work, in joules, is required by an external force to bring it to a position of x2 = 2.5 m apart when a = 19 and b = 11?    If the object starts at rest at a position x3 = 1.3 m and is released, at what speed v, in meters per second, will the object be moving when it is at position x4 = 12.5 m?

A 2.00-kg object has a velocity (5.60 î - 1.40 ĵ) m/s. (Note: From the definition of the dot product, v2 = v · v.) (a) What is its kinetic energy at this moment? J(b) Find the net work done on the object if its velocity changes to (8.00 î+ 4.00 ĵ) m/s. J

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Two force vectors are given P = Î+2ĵ+4k, and Q = 5î+8ĵ-2k. If the displacement vector is D = 1-5ĵ+2k, what is the total work done by these two forces?

The figure shows three forces applied to a trunk that moves leftward by 3.23 m over a frictionless floor. The force magnitudes are F1 = 4.70 N, F2 = 8.63 N, and F3 = 3.16 N, and the indicated angle is 0 = 60°. (a) During the displacement, what is the net work done on the trunk by the three applied forces, the gravitational force, and the normal force? (b) Is there a net transfer of energy to or from the trunk? (c) Does the kinetic energy of the trunk increase or decrease? (a) Number i Units (b) (c) >

Chapter 07, Problem 015 GO The figure shows three forces applied to a trunk that moves leftward by 2.87 m over a frictionless floor. The force magnitudes are F1 = 4.69 N, F2 = 9.16 N, and F3 = 3.25 N, and the indicated angle is 8 = 60°. (a) During the displacement, what is the net work done on the trunk by the three applied forces, the gravitational force, and the normal force? (b) Is there a net transfer of energy to or from the trunk? (c) Does the kinetic energy of the trunk increase or decrease? (a) Number Units (b) () the tolerance is +/-5% Click if you would like to Show Work for this question: Open Show Work

The figure here shows an overhead view of three horizontal forces acting on a cargo canister that was initially stationary but that now moves across a frictionless floor. The force magnitudes are F₁ = 2.60 N, F₂= 3.60 N, and F3 = 10.0 N, and the indicated angles are 02 = 49.0° and 93 = 30.0°. What is the net work done on the canister by the three forces during the first 3.90 m of displacement? 8₂ 03 Number i 11 Unit J

The figure here shows an overhead view of three horizontal forces acting on a cargo canister that was initially stationary but that now moves across a frictionless floor. The force magnitudes are F₁ = 2.80 N, F₂ = 3.60 N, and F3 = 10.0 N, and the indicated angles are 0₂ = 52.0° and 03 = 32.0 ˚. What is the net work done on the canister by the three forces during the first 4.00 m of displacement? 15 15 Number 03 F F3 Unit

A physicist has been studying the effects of an unknown force. The work required to move an object distance x against this force is W = A + bx, where A and b are constants. What are the SI units of b? O kg/s? kg · m/s? O kg - m²/s² kg · m³/s? kg · m4/s² none of these