Question

1). In a uniform circular motion, instantaneous velocity is tangent to the circle a) True b) False c) Can's say 2).In a uniform circular motion, acceleration is normal to the velocity and directed toward the center a) True b) False c) Unknown 3). For a particle of mass 'm' moving with a uniform velocity 'v'in a circle of radius 'r', write the expression for centripetal force (Fc)? 4). If a particle rotates in a circle of radius r = 10 cm with a velocity v = 1 m/s, how much acceleration it experiences toward the center? 5). An object revolving in a circular orbit and performs 10 revolution per minute. What is the frequency (t) and the period (T)? 6). For question (4), what is the angular velocity (c)? 7). Imagine you are driving in a curved road, which has a constant of static friction 0.5. Find the force of friction exerted by the road on the tire for the car of 1000 kg moving with a speed of 25 miles/hour. 8).For 20 mile/hour speed limit in a curved road of radius r = 200 m, what banking angle should be recommend in order to avoid accident. 9). What is the gravitational force between earth and an object of mass m = 10 kg lying on the earth surface? Use constants for earth mass, radius and gravitational constant as discussed. 10). The gravitational force is inversely proportional to the distance between two objects. This means the gravitational force between objects increases by decreasing the distance. a) True b) False c) Unknown

Answer 1

Instantaneous velocity is tangent to the circle: True ② True ③ E = my o. lm