Pick out the only vector quantity in the following list:  Temperature, pressure, impulse, time, power, total path length, energy, gravitational  potential, coefficient of friction, charge.

When a 0.0577-kg golf ball takes off after being hit, its speed is 42.6 m/s. (a) How much work is done on the ball by the club? (b) Assume that the force of the golf club acts parallel to the motion of the ball and that the club is in contact with the ball for a distance of 0.0231 m. Ignore the weight of the ball and determine the average force applied to the ball by the club. (a) Number i Units (b) Number i I Units

A 50 kg woman steps onto an up-going escalator, which has an incline of 32° with respect to the horizontal and is moving at 0.5 m/s. The top of the escalator is 20 m above the ground level. Calculate how much work is done by the friction force between the woman's feet and the escalator step, as she moves from the bottom to the top of the escalator. Express your answer in joules.

A 600-kg roller coaster car starts at a height of 35.0 m.  Assuming negligible energy losses to friction and air resistance, determine the PE, KE, and speed of the car at the carious locations (Start, A, B, C, D, E, and F) along the track.   Round your answers to the nearest whole number.

Two lead balls each have a mass of 1 kg, and their centres are located 10 cm apart from each other. What is the gravitational potential energy of the two masses? [Neglect the Earth's gravity for this question.]

The graph in the figure below shows the magnitude of the force ex- erted by a given spring as a function of the distance x the spring is stretched. How much work is needed to stretch this spring: (a) a distance of 5.0 cm, starting with it unstretched, and (b) from x - 2.0 cm to x = 7.0 cm? F (N) x (cm) 1 2 3 4 5 6 67 8 350 300 250 200 150 100 50

While doing a chin-up, a man lifts his body 0.40 m. (a) How much work must the man do per kilogram of body mass? (b) The muscles involved in doing a chin-up can generate about 70 J of work per kilogram of muscle mass. If the man can just barely do a 0.40-m chin-up, what percentage of his body's mass do these muscles constitute? (For comparison, the total percentage of muscle in a typical 70-kg man with 14% body fat is about 43%.)

In the figure, a block of mass m = 1.40 kg slides head on into a spring of spring constant k = 220 N/m. When the block stops, it has compressed the spring by 14.0 cm. The coefficient of kinetic friction between block and floor is 0.280. While the block is in contact with the spring and being brought to rest, what are (a) the work done by the spring force and (b) the increase in thermal energy of the block-floor system? (c) What is the block's speed just as the block reaches the spring? (a) Number (b) Number i i (c) Number i Units Units Units 4 ←

In the figure, a 3.97 g ice flake is released from the edge of a hemispherical bowl whose radius ris 13.7 cm. The flake-bowl contact is frictionless. (a) How much work is done on the flake by the gravitational force during the flake's descent to the bottom of the bowl? (b) What is the change in the potential energy of the flake-Earth system during that descent? (c) If that potential energy is taken to be zero at the bottom of the bowl, what is its value when the flake is released? (d) If, instead, the potential energy is taken to be zero at the release point, what is its value when the flake reaches the bottom of the bowl? Ice flake- DI

A 60-kilogram student climbs a ladder a vertical distance of 4.0 meters in 8.0 seconds. Approximately how much total work is done against gravity by the student during the climb? O 2.4 x 10³ J O 2.9 × 10³ J O 2.4 x 10?J O 3.0 x 10' J