A 1100-kg car is being driven up a 8.91 ° hill. The frictional force is directed opposite to the motion of the car and has a magnitude of 511 N. A force F is applied to the car by the road and propels the car forward. In addition to these two forces, two other forces act on the car: its weight W and the normal force FN directed perpendicular to the road surface. The length of the road up the hill is 332 m. What should be the magnitude of F, so that the net work done by all the forces acting on the car is 173 kJ?

The coefficient of kinetic friction between the m (kg) crate and the plane is u = 0.25. Initially the spring is compressed at x (m) and the crate is at rest. The initial state is at h =0 m. Find the equation that will define the distance d the crate will travel upward and be again at rest. k = 2 kN/m and e (degrees) is the angle between the plane and the horizontal. g = 9.81 m/s². O mx? /(9.81 * m * cos0 + 0.25 * 9.81 * m * sind) m O mx? /(9.81 * m * sind) m O mx? /(9.81 * m * sino + 0.25 * 9.81 * m * cos0) m O Imx? /(9.81 * m * cos0 0.25 *9.81 * m* sino) m Clear my choice

A proton (mass m = 1.67 x 10-27 kg) is being accelerated along a straight line at 3.60 x 1013 m/s² in a machine. If the proton has an initial speed of 8.30 × 104 m/s and travels 4.90 cm, what then is (a) its speed and (b) the increase in its kinetic energy? (a) Number (b) Number i Units Units J m/s

A 68.3-kg circus performer is fired from a cannon that is elevated at an angle of 52.6° above the horizontal. The cannon uses strong elastic bands to propel the performer, much in the same way that a slingshot fires a stone. Setting up for this stunt involves stretching the bands by 2.00 m from their unstrained length. At the point where the performer flies free of the bands, his height above the floor is the same as that of the net into which he is shot. He takes 2.38 s to travel the horizontal distance of 21.3 m between this point and the net. Ignore friction and air resistance and determine the effective spring constant of the firing mechanism. Number i Units

A 21.0 cm long spring is hung vertically from a ceiling and stretches to 25.9 cm when a 7.00 kg mass is hung from its free end. HINT (a) Find the spring constant (in N/m).  N/m (b) Find the length of the spring (in cm) if the 7.00 kg weight is replaced with a 205 N weight.  cm

Answer correctly the question: An m=3.84kg block situated on a rough incline is connected to a spring of negligible mass having a spring constant of k=100. N/m. The pulley is frictionless and massless. The block starts at rest at the position where the spring is unstretched. The block moves 15.1 cm down the incline before coming to rest. Take θ=38.8 as the angle. Calculate the coefficient of kinetic friction between block and incline. The answer is not 0.29

A bowling ball is attached to a 2.91-meter long cable and hung from the ceiling. The cable is kept taut and the ball is raised to an initial height of 1.73 meters above the classroom floor. It is released from rest and allowed to swing as a pendulum. Determine its speed (in m/s) when it is at a height of 1.17 meters above the floor.

An object with mass 0.60 kg is suspended from the ceiling at the end of a 2.0 m long string. When the mass is pulled to the side (at an unknown angle) and released, you measure the speed to be 4.0 m/s at the lowest point of its path. What maximum angle does the string make with the vertical as the object swings up? Note: air resistance can be ignored. Options 69 degrees 77 degrees 47 degrees 61 degrees 54 degrees 50 degrees