..10 points (a) 5 points A 220 kg motorcycle is cruising at 14m/s. What is the...
After a tornado, a 0.50 g straw was found embedded 2.3 cm into the trunk of a tree. Part A If the average force exerted on the straw by the tree was 90 N , what was the speed of the straw when it hit the tree? Express your answer using two significant figures. V AC 6 H O 2 ? Submit Request Answer
ID: A 4. Consider the 13.0 kg motorcycle wheel shown in the figure. Assume it to be approximately an annular ring with an inner radius of RI -0.280 m and an outer radius of R2 = 0.320 m. The motorcycle is on its center stand, so that the wheel can spin freely. If the drive chain exerts a force of 2450 N at a radius of 5.00 cm, what is the angular acceleration (in rad/s2) of the wheel? a. 55...
1) A 67-kg base runner begins his slide into second base when he is moving at a speed of 3.7 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to friction acting on the runner? (b) How far does he slide? 2) A running 53-kg cheetah has a top speed of 31 m/s. (a) What...
A 2 x 10^-3 kg bullet (m) is shot into a 5 kg block (M) of wood which is fixed to a friction less horizontal surface. The bullet hits the block at v = 500m/s 1) Calculate the magnitude of the momentum of the bullet as it hits the block. 2) The bullet embeds itself in the block. How much work is done by the resistive force due to the block in bringing the bullet to rest? 3) The average...
A 10 kg object is suspended from a spring causes the spring to lengthen by 5 cm down. The object is subjected to a force of 2cos (t / 4) N (newtons), and it moves in a medium where the viscosity force is 1N when the speed is 6 cm / s. If the object is set in motion from its position of equilibrium with an initial speed of 2 cm / s, formulate the initial value problem that describes...
T=163 N (k) Suppose m1-5 kg and m2-9 kg. What is the value of the acceleration? (I) Suppose that m2 starts from rest at a height of 5 m. Use the kinematic equations to determine how long it takes for m2 to hit the ground 1.889 s Additional Materials Newton's Second Law Appendix 6. -10 points My Notes A bullet is shot into a block of plastic. The bullet penetrates the block 0.5 m. The mass of the bullet is...
8 of 10 Incorrec A block of mass m- 5.33 kg is attached to a spring which is resting on a horizontal frictionless table. Th Map block is pushed into the spring, compressing it by 5.00 cm, and is then released from rest. The spring begins to push the block back toward the equilibrium position at x = 0 cm. The graph shows the component of the force (in N) exerted by the spring on the block versus the position...
do all please. 1. A 20 Kg cart moving at 10 m/s collides with a 10 Kg cart moving at 20 m/ s. The two carts stick to each other after the collision. Calculate the final speed of the carts just after the collision if () They were moving in the same direction direction (i.e. thefaster bumped the slower from behind) (ii) They were moving at 90° respect to each other. (ii) They were moving at 30° respect to each...
Question 2 (5 points) A child on a sled (total mass 75 kg) coasts over a small hill in the snow at a speed of 3.5 m/s. The top of the hill can be modeled as a circle of radius 4.1 m. The coefficient of kinetic friction between the sled and the snow is 0.12 What friction force is exerted on the sled by the snow as the child goes over the hill? 27 N 88N 61N 740 N 120...
7. -10 points SerPSE10 8.3.P.007.MI. My Notes Ask Your Teacher A crate of mass 9.2 kg is pulled up a rough incline with an initial speed of 1.54 m/s. The pulling force is 104 N parallel to the incline, which makes an angle of 20.5° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 4.90 m. (a) How much work is done by the gravitational force on the crate? (b) Determine the increase in...