Question

A car having mass M₁= 1000 Kg moving initially at V_1i= 60 m/s collides with a car having mass M₂= 3000 Kg that was moving initially at V_2i = 20m/s. After the inelastic collision, the cars stick and move together. The final velocity of the two cars just after collision is V_f  =_______ m/s

Part A

40

20

60

30

Part B

If the collision time is t = 0.25 seconds, the force exerted on the car having mass M₂= 3000 Kg during the collision is ______ Newton.

If the collision time is t = 0.25 seconds, the force exerted on the car having mass M₂= 3000 Kg during the collision is ______ Newton.

60, 000

120, 000

30,000

240, 000

Part C

____ % of the KE is lost in the collision.

____ % of the KE is lost in the collision.

60

40

25

75

A ball of mass M= 0.4 Kg, which is attached to a string, rotates in a circle of radius R= 0.10 m. Period (T) is the time for one rotation. To complete 10 rotations, the ball takes a total time of 15 seconds. The centripetal force required to rotate the ball is ____ Newton

Part A

0.70

4

0.419

1.5

Answer 1