AP Physics Unit 7

Calculate the net torque (magnitude and direction) on the beam in the figure shown about an axis through O perpendicular to the page.

• 30 N·m, CCW

• 30 N·m, CW

• 36 N·m, CW

• 36 N·m, CCW

Calculate the net torque (magnitude and direction) on the beam in the figure shown about an axis through C perpendicular to the page.

• 30 N·m, CCW

• 30 N·m, CW

• 36 N·m, CW

• 36 N·m, CCW

A uniform plank of length 2.00 m and mass 30.0 kg is supported by three ropes, as indicated by the blue vectors in the figure. Find the tension T1 in the rope when a 700-N person is d = 0.500 m from the left end.

• 501 N

• 384 N

• 672 N

• 994 N

Tags

NGSS.HS-PS2-1

A uniform plank of length 2.00 m and mass 30.0 kg is supported by three ropes, as indicated by the blue vectors in the figure. Find the tension T2 in the rope when a 700-N

person is d = 0.500 m from the left end.

• 501 N

• 384 N

• 672 N

• 994 N

Tags

NGSS.HS-PS2-1

A uniform plank of length 2.00 m and mass 30.0 kg is supported by three ropes, as indicated by the blue vectors in the figure. Find the tension T3 in the rope when a 700-N

person is d = 0.500 m from the left end.

• 501 N

• 384 N

• 672 N

• 994 N

Tags

NGSS.HS-PS2-1

A hungry bear weighing 700. N walks out on a beam in an attempt to retrieve a basket of goodies hanging at the end of the beam as shown. The beam is uniform, weighs 200. N, and is 6.00 m long, and it is supported by a wire at an angle of θ = 60.0°. The basket weighs 80.0 N. When the bear is at x = 1.00 m, find the tension in the wire supporting the

beam.

• 343 N

• 297 N

• 685

• 257 N

Tags

NGSS.HS-PS2-1

A hungry bear weighing 700. N walks out on a beam in an attempt to retrieve a basket of goodies hanging at the end of the beam as shown. The beam is uniform, weighs 200. N, and is 6.00 m long, and it is supported by a wire at an angle of θ = 60.0°. The basket weighs 80.0 N. When the bear is at x = 1.00 m, find the horizontal component of the force exerted by the wall on the left end of the beam.

• 172 N to the right

• 172 N to the left

• 297 N to the right

• 297 N to the left

Tags

NGSS.HS-PS2-1

A hungry bear weighing 700. N walks out on a beam in an attempt to retrieve a basket of goodies hanging at the end of the beam as shown. The beam is uniform, weighs 200. N, and is 6.00 m long, and it is supported by a wire at an angle of θ = 60.0°. The basket weighs 80.0 N. When the bear is at x = 1.00 m, find the vertical component of the force exerted by the wall on the left end of the beam.

• 683 N upward

• 683 N downward

• 980 N upward

• 980 N downward

Tags

NGSS.HS-PS2-1

A hungry bear weighing 700. N walks out on a beam in an attempt to retrieve a basket of goodies hanging at the end of the beam as shown. The beam is uniform, weighs 200. N, and is 6.00 m long, and it is supported by a wire at an angle of θ = 60.0°. The basket weighs 80.0 N. If the wire can withstand a maximum tension of 900. N, what is the maximum distance the bear can walk before the wire breaks?

• 5.14 m

• 8.22 m

• 2.31 m

• 6.17 m

Tags

NGSS.HS-PS2-1