1 When a race car is traveling at a constant speed on a circular track, their an

Question

1 When a race car is traveling at a constant speed on a circular track, their angular (A) constant (B) increasing (C) decreasing (D) zero (E) unkown 2 Three brothers are rolling a fourth sibling across the floor, without sliding, at a velocity that is increasing at a constant rate. What does this tell you? (A) the net torque acting on the fourth sibling is (B) the net torque greater than zero acting on the sibling is zero (C) the net torque acting on the fourth sibling is changing (D) not enough info -3 A gymnast is flying through the air in projectile motion, you can ignore air resistance, the Torque acting on them due to the force of gravity is. (A) constant (B) increasing (C) decreasing (D) zero (E) unkown 4 895 radians is .. () 15.6 degrees (B) 285 degrees (c) 142.5 degrees (D) 51305.7 degrees E) None of the above s. A ball accelerates from an initial rotational velocity of 55 rad/s to a final rotational velocity of 30 rad/s in 3.5 s. What is the (A) 15 rad/s B)7.14 rad/s2 (C) 0.14 rad/s2 (D) 8.57 rad/s2

Explanation / Answer

The angular accelration is zero. It sweeps equal angle in time period. So the speed is same. So zero acceleration

The torque=force *distance, and force=mass*acceleration

We know that since the velocity is increasing the acceleration is also increasing and the force increased and causing an increase in torque

Since it is moving the distance will also increase. This cause the torque increasing only

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