A 2 kg mass experiences a force F=3+2x in the x direcntin. What is the final velocity at x=1 m if the initial velocity at x=0 m is 1 m/s. (answer in m/s)
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A 2 kg mass experiences a force F=3+2x in the x direcntin. What is the final velocity at x=1 m if the initial velocity at x=0 m is 1 m/s. (answer in m/s)
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- The only force acting on a 2.0-kg body moving along the x axis is given by Fx = 2x where force is measured in Newtons, N, and x is in meters. If the velocity of the object at x = 0 is +3.0 m/s, how fast is it moving at x = 2.0 m?What average net force is required to bring a 1500-kg car to rest from a speed of 100 km/h within a distance of 55 m?Calculate the final speed of a 110-kg rugby player who is initially running at 8.00 m/s but collides head-on with a padded goalpost and experiences a backward force of 1.76 ×104 N for 5.50×10-2 s. 5.1 m/s 10 m/s 2 m/s 0.8 m/s
- a 3kg object is initally moving northward at 15m/s. then a force of 15N, towards the east, acts on it for 3.1 seconds. at the end of the 3.1 seconds, what is the magnitude of the objects final velocity?An office worker smacks a table, bringing his hand to rest in 0.0025 seconds from an initial speed of 4.00 m/s. How much force is exerted on the table, taking the effective mass of his forearm and hand to be 1.5 kg? (Answer in 1 decimal place, in kilo-newtons, no unit)A runner of mass 50kg and speed of 3m=s doesn't pay attention for a moment and slams into an obstacle. If the runner is stopped within a tenth of a second what is the force experienced by the runner?
- A train with mass of 2000 kg coasts on a frictionless track with a speed of 50 m/ s . How large a constant retarding force is required to stop it in a distance of 100 m?Sue gets up on the roof to clean off the leaf litter. Upon trying to get back down the ladder, she gets scared and doesn't think she can go down that way. She contemplates jumping off the roof, but has heard that is unsafe. If the roof is 10 feet high and she has a mass of 68.1 kg, how fast would she be going when she hit the ground if she jumped? State your answer in mi/hr.A block of mass m and speed v collides with a spring,compressing it a distance ∆x. What is the compression of thespring if the force constant of the spring is increased by a factorof four?
- Calculate the final speed of a 110 kg rugby player who is initially running at 8 m/s but collides head on with a padded goalpost and experiences a backward force of 1.76×104 N for 5.50×10−2 s. (Ans. = 0.8 m/s)A 1.00-kg particle experiences a force of 1.00N to the left for the first 3.00m and 1.25N to the right for the next 4.00m. If the particle starts from rest, what will be its final speed?Suppose a spring (with a spring constant of 600 n/m) is compressed 40cm. If a projectile of mass 50g is to be launched from this spring, what will be the projectile’s velocity upon release?