# Question

The linear momentum of a runner in a 100-m dash is 7.5 x 102 kg ∙ m/s. If the runner’s speed is 10 m/s, what is his mass?

## Answer to relevant Questions

An automobile with a linear momentum of 3.0 x 104 kg ∙ m/s is brought to a stop in 5.0 s. What is the magnitude of the average braking force? An astronaut (mass of 100 kg, with equipment) is headed back to her space station at a speed of 0.750 m/s but at the wrong angle. To correct her direction, she fires rockets from her backpack at right angles to her motion ...An incoming 0.14-kg baseball has a speed of 45 m/s. The batter hits the ball, giving it a speed of 60 m/s. If the contact time is 0.040 s, what is the average force of the bat on the ball? To get off a frozen, frictionless lake, a 65.0-kg person takes off a 0.150-kg shoe and throws it horizontally, directly away from the shore with a speed of 2.00 m/s. If the person is 5.00 m from the shore, how long does he ...An explosion of a 10.0-kg bomb releases only two separate pieces. The bomb was initially at rest and a 4.00-kg piece travels westward at immediately after the explosion. (a) What are the speed and direction of the other ...Post your question

0