33 Select the correct answer.

Which of the following is characteristic of the sliding filament theory?

O A

The sarcomere stays the same length.

OB.

The contractile filaments shorten.
OC.
The thin filaments slide past the thick filaments.

OD.

All of the above

When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great. d) about 10 times as great.

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot