A 1.5 kN block rests on a horizontal plane. The coefficient of kinetic friction is 0.1. A. Determine the time elapsed in seconds before the block reaches a velocity of 14.5 m/s starting from rest if it is acted upon by a horizontal force of 250N. B. How much longer (in seconds) will the block continue to move if the 250 N force is then removed?

A box with mass 13.0 kg moves on a ramp that is inclined at an angle of 55.0∘ above the horizontal. The coefficient of kinetic friction between the box and the ramp surface is μk = 0.300.  a. Calculate the magnitude of the acceleration of the box if you push on the box with a constant force 150.0 N that is parallel to the ramp surface and directed down the ramp, moving the box down the ramp. b. Calculate the magnitude of the acceleration of the box if you push on the box with a constant force 150.0 N that is parallel to the ramp surface and directed up the ramp, moving the box up the ramp.

A 48.42kg hunter ropes a 167.82 kg sleeping polar bear and pulls the bear towards him until they meet. Originally they are 211.22 m apart on frictionless ice. When the hunter pulls the polar bear to him the hunter will move... a. 52 b. 810 c. 67 d. 160

Calculate the magnitude of a normal force on a 22.7 kg block in the following circumstances. a. the block is resting on a level surface. b. the block is resting on a surface tilted up at 40.8 degrees with respect to the horizontal. c. the block is resting on the floor of an elevator that is accelerating upward at 2.53 m.s^2 d. the block is on the level surface and a force of 115 N is exerted on it at an angle of 40.8 degrees below the horizontal.

A slug with a mass of mm = 16 g is shot out of a rifle that has length LL = 0.72 m. The slug spends tt = 0.14 s in the barrel.a. Calculate the magnitude of the slug's acceleration, in meters per second squared, as it travels through the rifle's barrel. You may assume the acceleration is constant throughout the motion. b. What is the numerical value of the net force in newtons acting on the slug?

A supermarket pushcart is being pushed at 45 degrees with respect to the horizontal from the starting point to the cashier, which is 25 feet away. The cart is 5kg, it contains 2 boxes of 10-1b flour and seven packs of half-kilogram sugar. The coefficient of friction between the wheels and the floor is 0.03. a. What force is required? b. How much force is required?

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The net external force on the 25.5kg mower is 48.0N. If the force of friction is 22.5N. a. What force F in newtons is the person exerting on the mower? b.Suppose the mower is moving 1.10 m/s when the force F is removed. How fat will the mower go before stopping?

A 7.8 kg object undergoes an acceleration of 2.9 m/s^2 A. What is the magnitude of the resultant force acting on it? N B. If this same force is applied to a 4.7kg object, what acceleration is produced? m/s^2

A round with a mass of m=19.5g is fired out of a rifle that has a length L=1.18m. The round spends t=0.16s in the barrel.a. Calculate the magnitude of the round's accelration, in m/s2 as it travels thorugh the rilfe's barrel. You may assume that the acceleration is constant throughout the motion.b. What is the numerical value of the net force in newtons acting on the round?