Homework Answers
under equilibrium condition the net torque is zero
T_net = mg D+ mgL - F m d = 0
2(9.8)( 0.15) +M ( 9.8) ( 0.35) -540 N ( 0.06) = 0
M = 8.6kg
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Suppose the point of insertion of the biceps muscle into the lower arm shown in (Figure...
Part A Hold your upper arm vertical and your lower arm horizontal with your hand palm-down...
Part A Hold your upper arm vertical and your lower arm horizontal with your hand palm-down on a table, as shown in (Figure 1). If you now push down on the table, you'll feel that your triceps muscle has contracted and is trying to pivot your lower arm about the elbow joint. If a person with the arm dimensions shown pushes down hard with a 90 N force, what force must the triceps muscle provide? Ignore the mass of the...
A standard man holds the upper arm vertical and the lower arm horizontal with an object...
A standard man holds the upper arm vertical and the lower arm horizontal with an object of mass M = 5 kg resting on the hand, as illustrated in the figure. The mass of the lower arm and hand is one-half the mass of the entire arm. As shown in the figure, there are four forces acting on the lower arm: the force Fexerted by the bones and ligaments of the upper arm at the elbow (fulcrum), the tension T...
To practice Problem-Soving Strabegy 8 1 Staic equlibrium problems When you in an object by moving only your torearm, the main ifting musdle in your arm is the biceps Suppose the mass of...
To practice Problem-Soving Strabegy 8 1 Staic equlibrium problems When you in an object by moving only your torearm, the main ifting musdle in your arm is the biceps Suppose the mass of a fore arm is 150 kg If the biceps is connected to the fore arm a distanvce d 3.00 cm trom the elbow, how much force must the biceps exert to hold a 750 g ball at the end of Part F the forearm at distance d...
Hold your upper arm vertical and your lower arm horizontal with your hand palm-down on a table, as shown in the figur...
Hold your upper arm vertical and your lower arm horizontal with
your hand palm-down on a table, as shown in the figure. If you now
push down on the table, youll feel that your triceps muscle has
contracted and is trying to pivot your lower arm about the elbow
joint. If a person with the arm dimensions shown pushes down hard
with a 90 N force (about 20 lbs), what force must the triceps
muscle provide? You can ignore the...
biceps 2) Suppose that the dumbbell has a mass of 10.0 kg (so its weight equals...
biceps 2) Suppose that the dumbbell has a mass of 10.0 kg (so its weight equals 98.0 N) and the arm that holds it has a mass of 2.2 kg (with a weight of 21.6 N). The weight acts 3.0 cm from the elbow joint and we can think of all of the mass of the arm as at a distance of 14.0 cm from the elbow. Find the force in the biceps muscle if it attaches 3.1 cm from...
Hold your upper arm vertical and your lower arm horizontal with your hand palm-down on a...
Hold your upper arm vertical and your lower arm horizontal with
your hand palm-down on a table, as shown in the figure. If you now
push down on the table, youll feel that your triceps muscle has
contracted and is trying to pivot your lower arm about the elbow
joint. If a person with the arm dimensions shown pushes down hard
with a 90 N force (about 20 lbs), what force must the triceps
muscle provide? You can ignore the...
3. The figure shows an outstretched arm with a mass of 4.2 kg. The arm is...
3. The figure shows an outstretched arm with a mass of 4.2 kg. The arm is 56 cm long, and its center of gravity is 21 cm from the shoulder. The hand at the end of the arm hold a mass of 6.0 kg. (a) What is the torque about the shoulder due to the weights of the arm and the 6.0 kg mass? (b) If the arm is held in position by the deltoid muscle, whose force on the...
The total mass of the arm shown in (Figure 1) is 3.5 kg . The location...
The total mass of the arm shown in (Figure 1) is 3.5 kg . The
location of the center of mass of the arm is shown, FM is the force
exerted by the deltoid muscle on the upper arm, and FJ is the
normal force from the shoulder joint on the upper arm.
Part A
Determine the magnitude of the force required from the deltoid
muscle to hold up the outstretched arm in the position shown.
Part B
Suppose this...
FIGURE 12-7 2.5 cm 30.0 cm Elbow joint 21) Assuming the lower arm has a mass...
FIGURE 12-7 2.5 cm 30.0 cm Elbow joint 21) Assuming the lower arm has a mass of 2.8 kg and its CG is 12 cm from the elbow-joint pivot,21 how much force must the extensor muscle in the upper arm exert on the lower arm to hold a 7.5 kg shot put (Fig. 12-7)? E) 1000 N D) 100 N C) 500 N B) 1500 N A) 750 N .80
Suppose a 7 kg weight is added to the hand 25 cm from the fulcrum. How...
Suppose a 7 kg weight is added to the hand 25 cm from the fulcrum. How much force does the biceps exert to hold the arm stationary if the insertion point is 5 cm from the fulcrum? [do not include units A 7-kg load is added to the hand 25 cm from the elbow. Fi D1- 5 cm
Part A Hold your upper arm vertical and your lower arm horizontal with your hand palm-down on a table, as shown in (Figure 1). If you now push down on the table, you'll feel that your triceps muscle has contracted and is trying to pivot your lower arm about the elbow joint. If a person with the arm dimensions shown pushes down hard with a 90 N force, what force must the triceps muscle provide? Ignore the mass of the...
A standard man holds the upper arm vertical and the lower arm horizontal with an object of mass M = 5 kg resting on the hand, as illustrated in the figure. The mass of the lower arm and hand is one-half the mass of the entire arm. As shown in the figure, there are four forces acting on the lower arm: the force Fexerted by the bones and ligaments of the upper arm at the elbow (fulcrum), the tension T...
To practice Problem-Soving Strabegy 8 1 Staic equlibrium problems When you in an object by moving only your torearm, the main ifting musdle in your arm is the biceps Suppose the mass of a fore arm is 150 kg If the biceps is connected to the fore arm a distanvce d 3.00 cm trom the elbow, how much force must the biceps exert to hold a 750 g ball at the end of Part F the forearm at distance d...
Hold your upper arm vertical and your lower arm horizontal with
your hand palm-down on a table, as shown in the figure. If you now
push down on the table, youll feel that your triceps muscle has
contracted and is trying to pivot your lower arm about the elbow
joint. If a person with the arm dimensions shown pushes down hard
with a 90 N force (about 20 lbs), what force must the triceps
muscle provide? You can ignore the...
biceps 2) Suppose that the dumbbell has a mass of 10.0 kg (so its weight equals 98.0 N) and the arm that holds it has a mass of 2.2 kg (with a weight of 21.6 N). The weight acts 3.0 cm from the elbow joint and we can think of all of the mass of the arm as at a distance of 14.0 cm from the elbow. Find the force in the biceps muscle if it attaches 3.1 cm from...
Hold your upper arm vertical and your lower arm horizontal with
your hand palm-down on a table, as shown in the figure. If you now
push down on the table, youll feel that your triceps muscle has
contracted and is trying to pivot your lower arm about the elbow
joint. If a person with the arm dimensions shown pushes down hard
with a 90 N force (about 20 lbs), what force must the triceps
muscle provide? You can ignore the...
3. The figure shows an outstretched arm with a mass of 4.2 kg. The arm is 56 cm long, and its center of gravity is 21 cm from the shoulder. The hand at the end of the arm hold a mass of 6.0 kg. (a) What is the torque about the shoulder due to the weights of the arm and the 6.0 kg mass? (b) If the arm is held in position by the deltoid muscle, whose force on the...
The total mass of the arm shown in (Figure 1) is 3.5 kg . The
location of the center of mass of the arm is shown, FM is the force
exerted by the deltoid muscle on the upper arm, and FJ is the
normal force from the shoulder joint on the upper arm.
Part A
Determine the magnitude of the force required from the deltoid
muscle to hold up the outstretched arm in the position shown.
Part B
Suppose this...
FIGURE 12-7 2.5 cm 30.0 cm Elbow joint 21) Assuming the lower arm has a mass of 2.8 kg and its CG is 12 cm from the elbow-joint pivot,21 how much force must the extensor muscle in the upper arm exert on the lower arm to hold a 7.5 kg shot put (Fig. 12-7)? E) 1000 N D) 100 N C) 500 N B) 1500 N A) 750 N .80
Suppose a 7 kg weight is added to the hand 25 cm from the fulcrum. How much force does the biceps exert to hold the arm stationary if the insertion point is 5 cm from the fulcrum? [do not include units A 7-kg load is added to the hand 25 cm from the elbow. Fi D1- 5 cm
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