MECHANICS 1 QUIZ

A vehicle having rectilinear motion is moving with a velocity of 36 kph and accelerates uniformly to 54 kph over a distance of 125 m. What will be the time taken to cover this distance?

• 5 s

• 15 s

• 20 s

• 10 s

A person throws a ball at an angle of 30deg. with the horizontal with a velocity of 32 m/s. As the ball is thrown, a second person is running past the thrower at a constant velocity. At what velocity must this second person run so that she may catch the ball as it hits the ground?

• 32 m/s

• 64 m/s

A snowball is thrown out the window of a car moving at 20 m/s. The ball is thrown vertically to hit a snowman 20 meters away at window level. What speed would the snowball need to be thrown to hit the snowman?

• 2.5 m/s

• 9.8 m/s

• 4.9 m/s

• 14.7 m/s

A ball is dropped from a height of 15m above a tile floor. If the coefficient of restitution between the ball and the floor is 0.85, find the rebound height of the ball.

• 15.28 m

• 13.25 m

• 14.51 m

• 10.84 m

A ball is dropped from a height of 20m above a tile floor and rebounds to a height of 15m. Find the coefficient of restitution between the ball and the floor

• 0.87

• 0.56

• 0.92

• 0.75

When a ball is tossed straight up, it momentarily comes to a stop at the top of this path. Is it in equilibrium during this brief moment?

• No, because it is weightless

• Yes, because there are no net forces acting on it

• No, because its motions is changing

• Yes, because it is not moving

A book is at rest on top of a table. Which of the following is correct?

• There is no force acting on the book

• The book is in equillibrium

• The inertia of the book is equal to the inertia of the table

• There is no force acting on the table

A painter weight 750 newtons stands on a single board scaffold that is supported at each end by a vertical rope from above. If one rope has a tension of 500 newtons and the other has a tension of 350 newtons, what is the weight of the board?

• 500 N

• 250 N

• 432 N

• 100 N

The property of a moving object to continue moving is what Galileo called

• Acceleration

• Speed

• Direction

• Inertia

A hockey puck sliding across the ice toward the goal is a good illustration of

• Newton's 2nd law of motion

• Newton's 1st law of motion

• Newton's 3rd law of motion

• Newton's 3rd law of motion