![]() A roller coaster is moving at 25 m/s at the bottom of a hill. What is the acceleration of the coaster? 2. Two seconds later it reaches the bottom of the hill with a velocity of 26m/s. A roller coasters velocity at the top of the hill is 10 m/s. ![]() Neglecting any friction, how much force will the engine have to supply to keep going the same speed?ġ. A car whose mass is 1000 kg is traveling at a constant speed of 10 m/s. How much force does the earth apply to the hammer? 7. The hammer has a mass of 9 kg, and gravity accelerates it at the usual 9.8 m/s2. A worker drops his hammer off the roof of a house. How much force would it take to push another, larger friend who has a mass of 70 kg to accelerate at the same rate of 4 m/s2? 6. She has a mass of 50 kg and accelerates at a rate of 4 m/s2. How much force (in Newtons) is the wind exerting on the cup? 4. The cup has a mass of 25 grams ( = ? kg) and accelerates at a rate of 5 m/s 2. The wind pushes a paper cup along the sand at a beach. How much force did you exert on the cart? 3. The cart accelerates at a rate of 3 m/s 2. The cart is full of groceries and has a mass of 18 kg. You give a shopping cart a shove down the isle. What amount of force acted on the ball? 2. A man hits a golf ball (0.2 kg) which accelerates at a rate of 20 m/s2. calculate the acceleration of the object. Determine the net force acting on the object and b. ![]() An object of mass 30 kg is falling in air and experiences a force due to air resistance of 50 newtons. Determine the acceleration of the object. An object of mass 30 kg is in free fall in a vacuum where there is no air resistance. Calculate the acceleration of the object. A 5 kg block is pulled across a table by a horizontal force of 40 N with a frictional force of 8 N opposing the motion. Calculate the force required to produce this acceleration. An object of mass 300 kg is observed to accelerate at the rate of 4 m/s2. If a 60 kg person on a 15 kg sled is pushed with a force of 300 N, what will be person's acceleration? 9. A bowling ball rolled with a force of 15 N accelerates at a rate of 3 m/sec2 a second ball rolled with the same force accelerates 4 m/sec2. A force of 250 N is applied to an object that accelerates at a rate of 5 m/sec2. A 50 kg skater pushed by a friend accelerates 5 m/sec2. How much force would be required to accelerate the car at a rate of 3 m/sec2? 5. What is the acceleration of a 50 kg object pushed with a force of 500 newtons? 4. What is the force on a 1000 kg elevator that is falling freely at 9.8 m/sec2? 3. How much force is needed to accelerate a 66 kg skier at 2 m/sec2? 2.
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