An object of mass 0.93 kg is initially at rest. When a force acts on it for 2.9 ms it acquires a speed of 16.2 m/s. Find the magnitude (in N) of the average force acting on the object during the 2.9 ms time interval. (Enter a number.)

An object of mass 0.77 kg is initially at rest. When a force acts on it for 2.9 ms it acquires a speed of 12.7 m/s. Find the magnitude (in N) of the average force acting on the object during the 2.9 ms time interval. (Enter a number.) N

A force is acting between the surfaces of these two solid objects where one object is sliding on the surface of another object. The presence of this force makes the object start to slow down. In which direction does this force act in relation to the motion of the object? O This force is acting perpendicular to the velocity of the object. This force is acting in the opposite direction as the velocity of the object. This force is acting at an angle to the velocity of the object. O This force is acting in the same direction as the velocity of the object.

a a resistive force of magnitude (kmv - ma) N, where k and a are constants. (a) Show that dv (a – kv) dt %3D (b) If vo is the speed of the particle at time t = 0 s, show that: 1 kvo t In k a - kv

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After falling from rest from a height of 29 m, a 0.45-kg ball rebounds upward, reaching a height of 19 m. If the contact between ball and ground lasted 2.2 ms, what average force was exerted on the ball? (Enter the magnitude.) N

When serving a tennis ball, the player hits it when its velocity is zero (at the highest point of a vertical toss). The racket exerts a force of 530 N on the ball for 5.00 ms, giving it a final velocity of 44.0 m/s. Using these data, find the mass of the ball. g Additional Materials I Reading

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force (in N) exerted on a 0.0400 kg bullet to accelerate it to a speed of 700 m/s in a time of 3.20 ms (milliseconds)? (Enter the magnitude.) N DETAILS When serving a tennis ball, a player hits the ball when its velocity is zero (at the highest point of a vertical toss). The racquet exerts a force of 484 N on the ball for 4.66 ms, giving it a final velocity of 46.3 m/s. Using these data, find the mass (in g) of the ball. 9 MY NOTES ASK YOUR TEACHE

An object of mass 0.69 kg is initially at rest. When a force acts on it for 2.9 ms it acquires a speed of 12.0 m/s. Find the magnitude (in N) of the average force acting on the object during the 2.9 ms time interval. (Enter a number.) N

A physics professor is pushed up a ramp inclined upward at an angle 30.0° above the horizontal as he sits in his desk chair that slides on frictionless rollers. Part A The combined mass of the professor and chair is 86.0 kg. He is pushed a distance 2.10 m along the incline by a group of students who together exert a constant horizontal force of 610N. The professor's speed at the bottom of the ramp is 1.85 m/s Use the work-energy theorem to find his speed at the top of the ramp. Express your answer in meters per second. V ΑΣφ ? V = m/s 國