Car A travels with speed v around curve number one. which has a radius r. Car B

Question

Car A travels with speed v around curve number one. which has a radius r. Car B travels with speed 2v around curve number two. which has a radius 2r. The acceleration will be zero for both cars. the same for both cars. greater for car A. greater for car B. The force that accelerates a car on a level road is exerted by the road. gears. tires. gasoline. motor A 10 - pound sack of potatoes falls from an airplane. As the velocity of the falling sack increases, so does the air resistance on it. When the air resistance equal 10 pounds, the acceleration of the sack will be zero 9.8 m/s 9.8 m/s^2 100 ft/s^2.

Explanation / Answer

here,

QUES 11
Acceleration in Circular path is given as:
Ac = V^2/r

Car A case:
A1 = v^2/r

Car B case:
A2 = 4v^2/2r
A2 = 2*A1

Option D is correct

QUES 12:
The reaction force from the road pushes up on the wheels. so road i.e OptionA is correct answer.

QUES 13:
mass of potatoe, m = 10 pounds = 4.54 kg
resistance force, Fr = 10 pounds = 44.5 N

Gravity force acting on body, Fg = mg
Gravity force acting on body, Fg = 4.54 * 9.81
Gravity force acting on body, Fg = 44.5 N

Since Fg = Fr, so net acceleration of sack will be zero

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