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- A 75.0-g arrow, fired at a speed of 110 m/s to the left, impacts a tree, which it penetrates to a depth of 12.5 cm before coming to a stop. Assuming the force of friction exerted by the tree is constant, what are the magnitude and direction of the friction force acting on the arrow?A truck of mass 7 tonnes was moving with a velocity of 110 km/hr. The brakes were applied to bring the truck to 20 km/hr in 5 seconds, Determine the uniform force exerted by the brakes. Also find the velocity it will reach if the same force is applied in the same direction for 650 m and also find the time taken.A dragster reaches 350 km/h from rest in 6.2s. If the car is 800 kg and generates a driving force of 14000N, find the force of friction acting on the car.
- A truck of mass 7 tonnes was moving with a velocity of 145 km/hr. The brakes were applied to bring the truck to 5 km/hr in 450 m. Determine the uniform force exerted by the brakes. Also find the velocity it will reach if the same force is applied in the same direction for 9.5 seconds and also find the distance travelled in this period. The uniform force exerted by the brakes in N is The velocity it will reach if the same force is applied in the same direction for 9.5 seconds in m/s is The distance travelled if the same force is applied in the same direction in this period in m isa 400 N block slides on a horizontal plane by applying a horizontal force of 200 N and reaches a velocity of 20 m/s in a distance of 30 m. from rest. compute the coefficient of friction between the floor and the block.Consider an aircraft that takes off at 260 km/h when it is fully loaded. If the weight of the aircraft is increased by 10 percent as a result of overloading, determine the speed at which the overloaded aircraft will take off.
- A force of 600 N is applied on a block of mass M to pull it at a constant velocity up the incline at an angle of 30degrees with the horizontal. The coefficient of kinetic friction between the surface of the incline and the block is 0.5. Calculate the mass of the block.The net external force on the 24-kg mower is stated to be 51 N. If the force of friction opposing the motion is 24 N, what force (in newtons) is the person exerting on the mower? Suppose the mower is moving at 1.5 m/s when the force is removed. How far will the mower go before stopping?A car of mass 480kg moving at a speed of 54km/h is stopped by applying brakes in 10s. Calculate the force applied by the brakes.
- A box with a mass of 5 kg accelerates its speed in a straight line, increasing it from 5 m/s to 8 m/s, due to the application of an external force acting for a duration of 2.0 s. Calculate the average strength of this force.A 40-ton railroad car moving at 2mph along a level track strikes and is coupled to a stationary 60-ton car in 0.50 second.Determine the average force acting on each car during the coupling. (Ans. 8750 lb)A 6 kg crate is pulled by a force of 185 N at an angle of 18^0 from the horizontal. A constant frictional force of 47 N resisted the crate. Calculate the net force experiences by the crate